[FFmpeg-cvslog] twinvq: Split VQF-specific part from common TwinVQ decoder core
Kostya Shishkov
git at videolan.org
Tue Aug 6 16:41:32 CEST 2013
ffmpeg | branch: master | Kostya Shishkov <kostya.shishkov at gmail.com> | Sun Aug 4 17:18:34 2013 +0200| [86f4c59bd676672040b89d8fea4c9e3b59bfe7ab] | committer: Diego Biurrun
twinvq: Split VQF-specific part from common TwinVQ decoder core
Signed-off-by: Diego Biurrun <diego at biurrun.de>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=86f4c59bd676672040b89d8fea4c9e3b59bfe7ab
---
libavcodec/Makefile | 2 +-
libavcodec/twinvq.c | 572 +++---------------------------------------------
libavcodec/twinvq.h | 198 +++++++++++++++++
libavcodec/twinvqdec.c | 421 +++++++++++++++++++++++++++++++++++
4 files changed, 646 insertions(+), 547 deletions(-)
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index c58d18a..2ba1a32 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -355,7 +355,7 @@ OBJS-$(CONFIG_TRUESPEECH_DECODER) += truespeech.o
OBJS-$(CONFIG_TSCC_DECODER) += tscc.o msrledec.o
OBJS-$(CONFIG_TSCC2_DECODER) += tscc2.o
OBJS-$(CONFIG_TTA_DECODER) += tta.o
-OBJS-$(CONFIG_TWINVQ_DECODER) += twinvq.o
+OBJS-$(CONFIG_TWINVQ_DECODER) += twinvqdec.o twinvq.o
OBJS-$(CONFIG_TXD_DECODER) += txd.o s3tc.o
OBJS-$(CONFIG_ULTI_DECODER) += ulti.o
OBJS-$(CONFIG_UTVIDEO_DECODER) += utvideodec.o utvideo.o
diff --git a/libavcodec/twinvq.c b/libavcodec/twinvq.c
index 419a94f..94cc9da 100644
--- a/libavcodec/twinvq.c
+++ b/libavcodec/twinvq.c
@@ -25,229 +25,11 @@
#include "libavutil/channel_layout.h"
#include "libavutil/float_dsp.h"
#include "avcodec.h"
-#include "get_bits.h"
#include "fft.h"
#include "internal.h"
#include "lsp.h"
#include "sinewin.h"
-#include "twinvq_data.h"
-
-enum TwinVQFrameType {
- TWINVQ_FT_SHORT = 0, ///< Short frame (divided in n sub-blocks)
- TWINVQ_FT_MEDIUM, ///< Medium frame (divided in m<n sub-blocks)
- TWINVQ_FT_LONG, ///< Long frame (single sub-block + PPC)
- TWINVQ_FT_PPC, ///< Periodic Peak Component (part of the long frame)
-};
-
-#define TWINVQ_PPC_SHAPE_CB_SIZE 64
-#define TWINVQ_PPC_SHAPE_LEN_MAX 60
-#define TWINVQ_SUB_AMP_MAX 4500.0
-#define TWINVQ_MULAW_MU 100.0
-#define TWINVQ_GAIN_BITS 8
-#define TWINVQ_AMP_MAX 13000.0
-#define TWINVQ_SUB_GAIN_BITS 5
-#define TWINVQ_WINDOW_TYPE_BITS 4
-#define TWINVQ_PGAIN_MU 200
-#define TWINVQ_LSP_COEFS_MAX 20
-#define TWINVQ_LSP_SPLIT_MAX 4
-#define TWINVQ_CHANNELS_MAX 2
-#define TWINVQ_SUBBLOCKS_MAX 16
-#define TWINVQ_BARK_N_COEF_MAX 4
-
-/**
- * Parameters and tables that are different for each frame type
- */
-struct TwinVQFrameMode {
- uint8_t sub; ///< Number subblocks in each frame
- const uint16_t *bark_tab;
-
- /** number of distinct bark scale envelope values */
- uint8_t bark_env_size;
-
- const int16_t *bark_cb; ///< codebook for the bark scale envelope (BSE)
- uint8_t bark_n_coef;///< number of BSE CB coefficients to read
- uint8_t bark_n_bit; ///< number of bits of the BSE coefs
-
- //@{
- /** main codebooks for spectrum data */
- const int16_t *cb0;
- const int16_t *cb1;
- //@}
-
- uint8_t cb_len_read; ///< number of spectrum coefficients to read
-};
-
-typedef struct TwinVQFrameData {
- int window_type;
- enum TwinVQFrameType ftype;
-
- uint8_t main_coeffs[1024];
- uint8_t ppc_coeffs[TWINVQ_PPC_SHAPE_LEN_MAX];
-
- uint8_t gain_bits[TWINVQ_CHANNELS_MAX];
- uint8_t sub_gain_bits[TWINVQ_CHANNELS_MAX * TWINVQ_SUBBLOCKS_MAX];
-
- uint8_t bark1[TWINVQ_CHANNELS_MAX][TWINVQ_SUBBLOCKS_MAX][TWINVQ_BARK_N_COEF_MAX];
- uint8_t bark_use_hist[TWINVQ_CHANNELS_MAX][TWINVQ_SUBBLOCKS_MAX];
-
- uint8_t lpc_idx1[TWINVQ_CHANNELS_MAX];
- uint8_t lpc_idx2[TWINVQ_CHANNELS_MAX][TWINVQ_LSP_SPLIT_MAX];
- uint8_t lpc_hist_idx[TWINVQ_CHANNELS_MAX];
-
- int p_coef[TWINVQ_CHANNELS_MAX];
- int g_coef[TWINVQ_CHANNELS_MAX];
-} TwinVQFrameData;
-
-/**
- * Parameters and tables that are different for every combination of
- * bitrate/sample rate
- */
-typedef struct TwinVQModeTab {
- struct TwinVQFrameMode fmode[3]; ///< frame type-dependant parameters
-
- uint16_t size; ///< frame size in samples
- uint8_t n_lsp; ///< number of lsp coefficients
- const float *lspcodebook;
-
- /* number of bits of the different LSP CB coefficients */
- uint8_t lsp_bit0;
- uint8_t lsp_bit1;
- uint8_t lsp_bit2;
-
- uint8_t lsp_split; ///< number of CB entries for the LSP decoding
- const int16_t *ppc_shape_cb; ///< PPC shape CB
-
- /** number of the bits for the PPC period value */
- uint8_t ppc_period_bit;
-
- uint8_t ppc_shape_bit; ///< number of bits of the PPC shape CB coeffs
- uint8_t ppc_shape_len; ///< size of PPC shape CB
- uint8_t pgain_bit; ///< bits for PPC gain
-
- /** constant for peak period to peak width conversion */
- uint16_t peak_per2wid;
-} TwinVQModeTab;
-
-static const TwinVQModeTab mode_08_08 = {
- {
- { 8, bark_tab_s08_64, 10, tab.fcb08s, 1, 5, tab.cb0808s0, tab.cb0808s1, 18 },
- { 2, bark_tab_m08_256, 20, tab.fcb08m, 2, 5, tab.cb0808m0, tab.cb0808m1, 16 },
- { 1, bark_tab_l08_512, 30, tab.fcb08l, 3, 6, tab.cb0808l0, tab.cb0808l1, 17 }
- },
- 512, 12, tab.lsp08, 1, 5, 3, 3, tab.shape08, 8, 28, 20, 6, 40
-};
-
-static const TwinVQModeTab mode_11_08 = {
- {
- { 8, bark_tab_s11_64, 10, tab.fcb11s, 1, 5, tab.cb1108s0, tab.cb1108s1, 29 },
- { 2, bark_tab_m11_256, 20, tab.fcb11m, 2, 5, tab.cb1108m0, tab.cb1108m1, 24 },
- { 1, bark_tab_l11_512, 30, tab.fcb11l, 3, 6, tab.cb1108l0, tab.cb1108l1, 27 }
- },
- 512, 16, tab.lsp11, 1, 6, 4, 3, tab.shape11, 9, 36, 30, 7, 90
-};
-
-static const TwinVQModeTab mode_11_10 = {
- {
- { 8, bark_tab_s11_64, 10, tab.fcb11s, 1, 5, tab.cb1110s0, tab.cb1110s1, 21 },
- { 2, bark_tab_m11_256, 20, tab.fcb11m, 2, 5, tab.cb1110m0, tab.cb1110m1, 18 },
- { 1, bark_tab_l11_512, 30, tab.fcb11l, 3, 6, tab.cb1110l0, tab.cb1110l1, 20 }
- },
- 512, 16, tab.lsp11, 1, 6, 4, 3, tab.shape11, 9, 36, 30, 7, 90
-};
-
-static const TwinVQModeTab mode_16_16 = {
- {
- { 8, bark_tab_s16_128, 10, tab.fcb16s, 1, 5, tab.cb1616s0, tab.cb1616s1, 16 },
- { 2, bark_tab_m16_512, 20, tab.fcb16m, 2, 5, tab.cb1616m0, tab.cb1616m1, 15 },
- { 1, bark_tab_l16_1024, 30, tab.fcb16l, 3, 6, tab.cb1616l0, tab.cb1616l1, 16 }
- },
- 1024, 16, tab.lsp16, 1, 6, 4, 3, tab.shape16, 9, 56, 60, 7, 180
-};
-
-static const TwinVQModeTab mode_22_20 = {
- {
- { 8, bark_tab_s22_128, 10, tab.fcb22s_1, 1, 6, tab.cb2220s0, tab.cb2220s1, 18 },
- { 2, bark_tab_m22_512, 20, tab.fcb22m_1, 2, 6, tab.cb2220m0, tab.cb2220m1, 17 },
- { 1, bark_tab_l22_1024, 32, tab.fcb22l_1, 4, 6, tab.cb2220l0, tab.cb2220l1, 18 }
- },
- 1024, 16, tab.lsp22_1, 1, 6, 4, 3, tab.shape22_1, 9, 56, 36, 7, 144
-};
-
-static const TwinVQModeTab mode_22_24 = {
- {
- { 8, bark_tab_s22_128, 10, tab.fcb22s_1, 1, 6, tab.cb2224s0, tab.cb2224s1, 15 },
- { 2, bark_tab_m22_512, 20, tab.fcb22m_1, 2, 6, tab.cb2224m0, tab.cb2224m1, 14 },
- { 1, bark_tab_l22_1024, 32, tab.fcb22l_1, 4, 6, tab.cb2224l0, tab.cb2224l1, 15 }
- },
- 1024, 16, tab.lsp22_1, 1, 6, 4, 3, tab.shape22_1, 9, 56, 36, 7, 144
-};
-
-static const TwinVQModeTab mode_22_32 = {
- {
- { 4, bark_tab_s22_128, 10, tab.fcb22s_2, 1, 6, tab.cb2232s0, tab.cb2232s1, 11 },
- { 2, bark_tab_m22_256, 20, tab.fcb22m_2, 2, 6, tab.cb2232m0, tab.cb2232m1, 11 },
- { 1, bark_tab_l22_512, 32, tab.fcb22l_2, 4, 6, tab.cb2232l0, tab.cb2232l1, 12 }
- },
- 512, 16, tab.lsp22_2, 1, 6, 4, 4, tab.shape22_2, 9, 56, 36, 7, 72
-};
-
-static const TwinVQModeTab mode_44_40 = {
- {
- { 16, bark_tab_s44_128, 10, tab.fcb44s, 1, 6, tab.cb4440s0, tab.cb4440s1, 18 },
- { 4, bark_tab_m44_512, 20, tab.fcb44m, 2, 6, tab.cb4440m0, tab.cb4440m1, 17 },
- { 1, bark_tab_l44_2048, 40, tab.fcb44l, 4, 6, tab.cb4440l0, tab.cb4440l1, 17 }
- },
- 2048, 20, tab.lsp44, 1, 6, 4, 4, tab.shape44, 9, 84, 54, 7, 432
-};
-
-static const TwinVQModeTab mode_44_48 = {
- {
- { 16, bark_tab_s44_128, 10, tab.fcb44s, 1, 6, tab.cb4448s0, tab.cb4448s1, 15 },
- { 4, bark_tab_m44_512, 20, tab.fcb44m, 2, 6, tab.cb4448m0, tab.cb4448m1, 14 },
- { 1, bark_tab_l44_2048, 40, tab.fcb44l, 4, 6, tab.cb4448l0, tab.cb4448l1, 14 }
- },
- 2048, 20, tab.lsp44, 1, 6, 4, 4, tab.shape44, 9, 84, 54, 7, 432
-};
-
-typedef struct TwinVQContext {
- AVCodecContext *avctx;
- AVFloatDSPContext fdsp;
- FFTContext mdct_ctx[3];
-
- const TwinVQModeTab *mtab;
-
- // history
- float lsp_hist[2][20]; ///< LSP coefficients of the last frame
- float bark_hist[3][2][40]; ///< BSE coefficients of last frame
-
- // bitstream parameters
- int16_t permut[4][4096];
- uint8_t length[4][2]; ///< main codebook stride
- uint8_t length_change[4];
- uint8_t bits_main_spec[2][4][2]; ///< bits for the main codebook
- int bits_main_spec_change[4];
- int n_div[4];
-
- float *spectrum;
- float *curr_frame; ///< non-interleaved output
- float *prev_frame; ///< non-interleaved previous frame
- int last_block_pos[2];
- int discarded_packets;
-
- float *cos_tabs[3];
-
- // scratch buffers
- float *tmp_buf;
-
- TwinVQFrameData bits;
-} TwinVQContext;
-
-/** @note not speed critical, hence not optimized */
-static void memset_float(float *buf, float val, int size)
-{
- while (size--)
- *buf++ = val;
-}
+#include "twinvq.h"
/**
* Evaluate a single LPC amplitude spectrum envelope coefficient from the line
@@ -378,7 +160,8 @@ static void eval_lpcenv_2parts(TwinVQContext *tctx, enum TwinVQFrameType ftype,
interpolate(lpc + size / 2 - step + 1, lpc[size / 2],
lpc[size / 2 - step], step);
- memset_float(lpc + size - 2 * step + 1, lpc[size - 2 * step], 2 * step - 1);
+ twinvq_memset_float(lpc + size - 2 * step + 1, lpc[size - 2 * step],
+ 2 * step - 1);
}
/**
@@ -428,104 +211,6 @@ static void dequant(TwinVQContext *tctx, const uint8_t *cb_bits, float *out,
}
}
-static inline float mulawinv(float y, float clip, float mu)
-{
- y = av_clipf(y / clip, -1, 1);
- return clip * FFSIGN(y) * (exp(log(1 + mu) * fabs(y)) - 1) / mu;
-}
-
-/**
- * Evaluate a * b / 400 rounded to the nearest integer. When, for example,
- * a * b == 200 and the nearest integer is ill-defined, use a table to emulate
- * the following broken float-based implementation used by the binary decoder:
- *
- * @code
- * static int very_broken_op(int a, int b)
- * {
- * static float test; // Ugh, force gcc to do the division first...
- *
- * test = a / 400.0;
- * return b * test + 0.5;
- * }
- * @endcode
- *
- * @note if this function is replaced by just ROUNDED_DIV(a * b, 400.0), the
- * stddev between the original file (before encoding with Yamaha encoder) and
- * the decoded output increases, which leads one to believe that the encoder
- * expects exactly this broken calculation.
- */
-static int very_broken_op(int a, int b)
-{
- int x = a * b + 200;
- int size;
- const uint8_t *rtab;
-
- if (x % 400 || b % 5)
- return x / 400;
-
- x /= 400;
-
- size = tabs[b / 5].size;
- rtab = tabs[b / 5].tab;
- return x - rtab[size * av_log2(2 * (x - 1) / size) + (x - 1) % size];
-}
-
-/**
- * Sum to data a periodic peak of a given period, width and shape.
- *
- * @param period the period of the peak divised by 400.0
- */
-static void add_peak(int period, int width, const float *shape,
- float ppc_gain, float *speech, int len)
-{
- int i, j;
-
- const float *shape_end = shape + len;
- int center;
-
- // First peak centered around zero
- for (i = 0; i < width / 2; i++)
- speech[i] += ppc_gain * *shape++;
-
- for (i = 1; i < ROUNDED_DIV(len, width); i++) {
- center = very_broken_op(period, i);
- for (j = -width / 2; j < (width + 1) / 2; j++)
- speech[j + center] += ppc_gain * *shape++;
- }
-
- // For the last block, be careful not to go beyond the end of the buffer
- center = very_broken_op(period, i);
- for (j = -width / 2; j < (width + 1) / 2 && shape < shape_end; j++)
- speech[j + center] += ppc_gain * *shape++;
-}
-
-static void decode_ppc(TwinVQContext *tctx, int period_coef,
- const float *shape, float ppc_gain, float *speech)
-{
- const TwinVQModeTab *mtab = tctx->mtab;
- int isampf = tctx->avctx->sample_rate / 1000;
- int ibps = tctx->avctx->bit_rate / (1000 * tctx->avctx->channels);
- int min_period = ROUNDED_DIV(40 * 2 * mtab->size, isampf);
- int max_period = ROUNDED_DIV(40 * 2 * mtab->size * 6, isampf);
- int period_range = max_period - min_period;
-
- // This is actually the period multiplied by 400. It is just linearly coded
- // between its maximum and minimum value.
- int period = min_period +
- ROUNDED_DIV(period_coef * period_range,
- (1 << mtab->ppc_period_bit) - 1);
- int width;
-
- if (isampf == 22 && ibps == 32) {
- // For some unknown reason, NTT decided to code this case differently...
- width = ROUNDED_DIV((period + 800) * mtab->peak_per2wid,
- 400 * mtab->size);
- } else
- width = period * mtab->peak_per2wid / (400 * mtab->size);
-
- add_peak(period, width, shape, ppc_gain, speech, mtab->ppc_shape_len);
-}
-
static void dec_gain(TwinVQContext *tctx,
enum TwinVQFrameType ftype, float *out)
{
@@ -539,19 +224,19 @@ static void dec_gain(TwinVQContext *tctx,
if (ftype == TWINVQ_FT_LONG) {
for (i = 0; i < tctx->avctx->channels; i++)
out[i] = (1.0 / (1 << 13)) *
- mulawinv(step * 0.5 + step * bits->gain_bits[i],
- TWINVQ_AMP_MAX, TWINVQ_MULAW_MU);
+ twinvq_mulawinv(step * 0.5 + step * bits->gain_bits[i],
+ TWINVQ_AMP_MAX, TWINVQ_MULAW_MU);
} else {
for (i = 0; i < tctx->avctx->channels; i++) {
float val = (1.0 / (1 << 23)) *
- mulawinv(step * 0.5 + step * bits->gain_bits[i],
- TWINVQ_AMP_MAX, TWINVQ_MULAW_MU);
+ twinvq_mulawinv(step * 0.5 + step * bits->gain_bits[i],
+ TWINVQ_AMP_MAX, TWINVQ_MULAW_MU);
for (j = 0; j < sub; j++)
out[i * sub + j] =
- val * mulawinv(sub_step * 0.5 +
- sub_step * bits->sub_gain_bits[i * sub + j],
- TWINVQ_SUB_AMP_MAX, TWINVQ_MULAW_MU);
+ val * twinvq_mulawinv(sub_step * 0.5 +
+ sub_step * bits->sub_gain_bits[i * sub + j],
+ TWINVQ_SUB_AMP_MAX, TWINVQ_MULAW_MU);
}
}
}
@@ -721,34 +406,6 @@ static void imdct_output(TwinVQContext *tctx, enum TwinVQFrameType ftype,
}
}
-static void dec_bark_env(TwinVQContext *tctx, const uint8_t *in, int use_hist,
- int ch, float *out, float gain,
- enum TwinVQFrameType ftype)
-{
- const TwinVQModeTab *mtab = tctx->mtab;
- int i, j;
- float *hist = tctx->bark_hist[ftype][ch];
- float val = ((const float []) { 0.4, 0.35, 0.28 })[ftype];
- int bark_n_coef = mtab->fmode[ftype].bark_n_coef;
- int fw_cb_len = mtab->fmode[ftype].bark_env_size / bark_n_coef;
- int idx = 0;
-
- for (i = 0; i < fw_cb_len; i++)
- for (j = 0; j < bark_n_coef; j++, idx++) {
- float tmp2 = mtab->fmode[ftype].bark_cb[fw_cb_len * in[j] + i] *
- (1.0 / 4096);
- float st = use_hist ? (1.0 - val) * tmp2 + val * hist[idx] + 1.0
- : tmp2 + 1.0;
-
- hist[idx] = tmp2;
- if (st < -1.0)
- st = 1.0;
-
- memset_float(out, st * gain, mtab->fmode[ftype].bark_tab[idx]);
- out += mtab->fmode[ftype].bark_tab[idx];
- }
-}
-
static void read_and_decode_spectrum(TwinVQContext *tctx, float *out,
enum TwinVQFrameType ftype)
{
@@ -782,24 +439,18 @@ static void read_and_decode_spectrum(TwinVQContext *tctx, float *out,
float lsp[TWINVQ_LSP_COEFS_MAX];
for (j = 0; j < sub; j++) {
- dec_bark_env(tctx, bits->bark1[i][j], bits->bark_use_hist[i][j], i,
- tctx->tmp_buf, gain[sub * i + j], ftype);
+ tctx->dec_bark_env(tctx, bits->bark1[i][j],
+ bits->bark_use_hist[i][j], i,
+ tctx->tmp_buf, gain[sub * i + j], ftype);
tctx->fdsp.vector_fmul(chunk + block_size * j,
chunk + block_size * j,
tctx->tmp_buf, block_size);
}
- if (ftype == TWINVQ_FT_LONG) {
- float pgain_step = 25000.0 / ((1 << mtab->pgain_bit) - 1);
- float v = 1.0 / 8192 *
- mulawinv(pgain_step * bits->g_coef[i] +
- pgain_step / 2,
- 25000.0, TWINVQ_PGAIN_MU);
-
- decode_ppc(tctx, bits->p_coef[i],
- ppc_shape + i * mtab->ppc_shape_len, v, chunk);
- }
+ if (ftype == TWINVQ_FT_LONG)
+ tctx->decode_ppc(tctx, bits->p_coef[i], bits->g_coef[i],
+ ppc_shape + i * mtab->ppc_shape_len, chunk);
decode_lsp(tctx, bits->lpc_idx1[i], bits->lpc_idx2[i],
bits->lpc_hist_idx[i], lsp, tctx->lsp_hist[i]);
@@ -813,94 +464,14 @@ static void read_and_decode_spectrum(TwinVQContext *tctx, float *out,
}
}
-static void read_cb_data(TwinVQContext *tctx, GetBitContext *gb,
- uint8_t *dst, enum TwinVQFrameType ftype)
-{
- int i;
-
- for (i = 0; i < tctx->n_div[ftype]; i++) {
- int bs_second_part = (i >= tctx->bits_main_spec_change[ftype]);
-
- *dst++ = get_bits(gb, tctx->bits_main_spec[0][ftype][bs_second_part]);
- *dst++ = get_bits(gb, tctx->bits_main_spec[1][ftype][bs_second_part]);
- }
-}
-
-static const enum TwinVQFrameType wtype_to_ftype_table[] = {
+const enum TwinVQFrameType ff_twinvq_wtype_to_ftype_table[] = {
TWINVQ_FT_LONG, TWINVQ_FT_LONG, TWINVQ_FT_SHORT, TWINVQ_FT_LONG,
TWINVQ_FT_MEDIUM, TWINVQ_FT_LONG, TWINVQ_FT_LONG, TWINVQ_FT_MEDIUM,
TWINVQ_FT_MEDIUM
};
-static int twinvq_read_bitstream(AVCodecContext *avctx, TwinVQContext *tctx,
- const uint8_t *buf, int buf_size)
-{
- TwinVQFrameData *bits = &tctx->bits;
- const TwinVQModeTab *mtab = tctx->mtab;
- int channels = tctx->avctx->channels;
- int sub;
- GetBitContext gb;
- int i, j, k;
-
- init_get_bits(&gb, buf, buf_size * 8);
- skip_bits(&gb, get_bits(&gb, 8));
-
- bits->window_type = get_bits(&gb, TWINVQ_WINDOW_TYPE_BITS);
-
- if (bits->window_type > 8) {
- av_log(avctx, AV_LOG_ERROR, "Invalid window type, broken sample?\n");
- return AVERROR_INVALIDDATA;
- }
-
- bits->ftype = wtype_to_ftype_table[tctx->bits.window_type];
-
- sub = mtab->fmode[bits->ftype].sub;
-
- read_cb_data(tctx, &gb, bits->main_coeffs, bits->ftype);
-
- for (i = 0; i < channels; i++)
- for (j = 0; j < sub; j++)
- for (k = 0; k < mtab->fmode[bits->ftype].bark_n_coef; k++)
- bits->bark1[i][j][k] =
- get_bits(&gb, mtab->fmode[bits->ftype].bark_n_bit);
-
- for (i = 0; i < channels; i++)
- for (j = 0; j < sub; j++)
- bits->bark_use_hist[i][j] = get_bits1(&gb);
-
- if (bits->ftype == TWINVQ_FT_LONG) {
- for (i = 0; i < channels; i++)
- bits->gain_bits[i] = get_bits(&gb, TWINVQ_GAIN_BITS);
- } else {
- for (i = 0; i < channels; i++) {
- bits->gain_bits[i] = get_bits(&gb, TWINVQ_GAIN_BITS);
- for (j = 0; j < sub; j++)
- bits->sub_gain_bits[i * sub + j] =
- get_bits(&gb, TWINVQ_SUB_GAIN_BITS);
- }
- }
-
- for (i = 0; i < channels; i++) {
- bits->lpc_hist_idx[i] = get_bits(&gb, mtab->lsp_bit0);
- bits->lpc_idx1[i] = get_bits(&gb, mtab->lsp_bit1);
-
- for (j = 0; j < mtab->lsp_split; j++)
- bits->lpc_idx2[i][j] = get_bits(&gb, mtab->lsp_bit2);
- }
-
- if (bits->ftype == TWINVQ_FT_LONG) {
- read_cb_data(tctx, &gb, bits->ppc_coeffs, 3);
- for (i = 0; i < channels; i++) {
- bits->p_coef[i] = get_bits(&gb, mtab->ppc_period_bit);
- bits->g_coef[i] = get_bits(&gb, mtab->pgain_bit);
- }
- }
-
- return 0;
-}
-
-static int twinvq_decode_frame(AVCodecContext *avctx, void *data,
- int *got_frame_ptr, AVPacket *avpkt)
+int ff_twinvq_decode_frame(AVCodecContext *avctx, void *data,
+ int *got_frame_ptr, AVPacket *avpkt)
{
AVFrame *frame = data;
const uint8_t *buf = avpkt->data;
@@ -910,12 +481,6 @@ static int twinvq_decode_frame(AVCodecContext *avctx, void *data,
float **out = NULL;
int ret;
- if (buf_size * 8 < avctx->bit_rate * mtab->size / avctx->sample_rate + 8) {
- av_log(avctx, AV_LOG_ERROR,
- "Frame too small (%d bytes). Truncated file?\n", buf_size);
- return AVERROR(EINVAL);
- }
-
/* get output buffer */
if (tctx->discarded_packets >= 2) {
frame->nb_samples = mtab->size;
@@ -926,7 +491,7 @@ static int twinvq_decode_frame(AVCodecContext *avctx, void *data,
out = (float **)frame->extended_data;
}
- if ((ret = twinvq_read_bitstream(avctx, tctx, buf, buf_size)) < 0)
+ if ((ret = tctx->read_bitstream(avctx, tctx, buf, buf_size)) < 0)
return ret;
read_and_decode_spectrum(tctx, tctx->spectrum, tctx->bits.ftype);
@@ -1162,7 +727,7 @@ static av_cold void init_bitstream_params(TwinVQContext *tctx)
construct_perm_table(tctx, frametype);
}
-static av_cold int twinvq_decode_close(AVCodecContext *avctx)
+av_cold int ff_twinvq_decode_close(AVCodecContext *avctx)
{
TwinVQContext *tctx = avctx->priv_data;
int i;
@@ -1180,109 +745,24 @@ static av_cold int twinvq_decode_close(AVCodecContext *avctx)
return 0;
}
-static av_cold int twinvq_decode_init(AVCodecContext *avctx)
+av_cold int ff_twinvq_decode_init(AVCodecContext *avctx)
{
- int ret, isampf, ibps;
+ int ret;
TwinVQContext *tctx = avctx->priv_data;
tctx->avctx = avctx;
avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
- if (!avctx->extradata || avctx->extradata_size < 12) {
- av_log(avctx, AV_LOG_ERROR, "Missing or incomplete extradata\n");
- return AVERROR_INVALIDDATA;
- }
- avctx->channels = AV_RB32(avctx->extradata) + 1;
- avctx->bit_rate = AV_RB32(avctx->extradata + 4) * 1000;
- isampf = AV_RB32(avctx->extradata + 8);
-
- if (isampf < 8 || isampf > 44) {
- av_log(avctx, AV_LOG_ERROR, "Unsupported sample rate\n");
- return AVERROR_INVALIDDATA;
- }
- switch (isampf) {
- case 44:
- avctx->sample_rate = 44100;
- break;
- case 22:
- avctx->sample_rate = 22050;
- break;
- case 11:
- avctx->sample_rate = 11025;
- break;
- default:
- avctx->sample_rate = isampf * 1000;
- break;
- }
-
- if (avctx->channels <= 0 || avctx->channels > TWINVQ_CHANNELS_MAX) {
- av_log(avctx, AV_LOG_ERROR, "Unsupported number of channels: %i\n",
- avctx->channels);
- return -1;
- }
- avctx->channel_layout = avctx->channels == 1 ? AV_CH_LAYOUT_MONO
- : AV_CH_LAYOUT_STEREO;
-
- ibps = avctx->bit_rate / (1000 * avctx->channels);
-
- switch ((isampf << 8) + ibps) {
- case (8 << 8) + 8:
- tctx->mtab = &mode_08_08;
- break;
- case (11 << 8) + 8:
- tctx->mtab = &mode_11_08;
- break;
- case (11 << 8) + 10:
- tctx->mtab = &mode_11_10;
- break;
- case (16 << 8) + 16:
- tctx->mtab = &mode_16_16;
- break;
- case (22 << 8) + 20:
- tctx->mtab = &mode_22_20;
- break;
- case (22 << 8) + 24:
- tctx->mtab = &mode_22_24;
- break;
- case (22 << 8) + 32:
- tctx->mtab = &mode_22_32;
- break;
- case (44 << 8) + 40:
- tctx->mtab = &mode_44_40;
- break;
- case (44 << 8) + 48:
- tctx->mtab = &mode_44_48;
- break;
- default:
- av_log(avctx, AV_LOG_ERROR,
- "This version does not support %d kHz - %d kbit/s/ch mode.\n",
- isampf, isampf);
- return -1;
- }
-
avpriv_float_dsp_init(&tctx->fdsp, avctx->flags & CODEC_FLAG_BITEXACT);
if ((ret = init_mdct_win(tctx))) {
av_log(avctx, AV_LOG_ERROR, "Error initializing MDCT\n");
- twinvq_decode_close(avctx);
+ ff_twinvq_decode_close(avctx);
return ret;
}
init_bitstream_params(tctx);
- memset_float(tctx->bark_hist[0][0], 0.1, FF_ARRAY_ELEMS(tctx->bark_hist));
+ twinvq_memset_float(tctx->bark_hist[0][0], 0.1,
+ FF_ARRAY_ELEMS(tctx->bark_hist));
return 0;
}
-
-AVCodec ff_twinvq_decoder = {
- .name = "twinvq",
- .type = AVMEDIA_TYPE_AUDIO,
- .id = AV_CODEC_ID_TWINVQ,
- .priv_data_size = sizeof(TwinVQContext),
- .init = twinvq_decode_init,
- .close = twinvq_decode_close,
- .decode = twinvq_decode_frame,
- .capabilities = CODEC_CAP_DR1,
- .long_name = NULL_IF_CONFIG_SMALL("VQF TwinVQ"),
- .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
- AV_SAMPLE_FMT_NONE },
-};
diff --git a/libavcodec/twinvq.h b/libavcodec/twinvq.h
new file mode 100644
index 0000000..d3a548a
--- /dev/null
+++ b/libavcodec/twinvq.h
@@ -0,0 +1,198 @@
+/*
+ * TwinVQ decoder
+ * Copyright (c) 2009 Vitor Sessak
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_TWINVQ_H
+#define AVCODEC_TWINVQ_H
+
+#include <math.h>
+#include <stdint.h>
+
+#include "libavutil/common.h"
+#include "libavutil/float_dsp.h"
+#include "avcodec.h"
+#include "fft.h"
+#include "internal.h"
+
+enum TwinVQCodec {
+ TWINVQ_CODEC_VQF,
+ TWINVQ_CODEC_METASOUND,
+};
+
+enum TwinVQFrameType {
+ TWINVQ_FT_SHORT = 0, ///< Short frame (divided in n sub-blocks)
+ TWINVQ_FT_MEDIUM, ///< Medium frame (divided in m<n sub-blocks)
+ TWINVQ_FT_LONG, ///< Long frame (single sub-block + PPC)
+ TWINVQ_FT_PPC, ///< Periodic Peak Component (part of the long frame)
+};
+
+#define TWINVQ_PPC_SHAPE_CB_SIZE 64
+#define TWINVQ_PPC_SHAPE_LEN_MAX 60
+#define TWINVQ_SUB_AMP_MAX 4500.0
+#define TWINVQ_MULAW_MU 100.0
+#define TWINVQ_GAIN_BITS 8
+#define TWINVQ_AMP_MAX 13000.0
+#define TWINVQ_SUB_GAIN_BITS 5
+#define TWINVQ_WINDOW_TYPE_BITS 4
+#define TWINVQ_PGAIN_MU 200
+#define TWINVQ_LSP_COEFS_MAX 20
+#define TWINVQ_LSP_SPLIT_MAX 4
+#define TWINVQ_CHANNELS_MAX 2
+#define TWINVQ_SUBBLOCKS_MAX 16
+#define TWINVQ_BARK_N_COEF_MAX 4
+
+/**
+ * Parameters and tables that are different for each frame type
+ */
+struct TwinVQFrameMode {
+ uint8_t sub; ///< Number subblocks in each frame
+ const uint16_t *bark_tab;
+
+ /** number of distinct bark scale envelope values */
+ uint8_t bark_env_size;
+
+ const int16_t *bark_cb; ///< codebook for the bark scale envelope (BSE)
+ uint8_t bark_n_coef;///< number of BSE CB coefficients to read
+ uint8_t bark_n_bit; ///< number of bits of the BSE coefs
+
+ //@{
+ /** main codebooks for spectrum data */
+ const int16_t *cb0;
+ const int16_t *cb1;
+ //@}
+
+ uint8_t cb_len_read; ///< number of spectrum coefficients to read
+};
+
+typedef struct TwinVQFrameData {
+ int window_type;
+ enum TwinVQFrameType ftype;
+
+ uint8_t main_coeffs[1024];
+ uint8_t ppc_coeffs[TWINVQ_PPC_SHAPE_LEN_MAX];
+
+ uint8_t gain_bits[TWINVQ_CHANNELS_MAX];
+ uint8_t sub_gain_bits[TWINVQ_CHANNELS_MAX * TWINVQ_SUBBLOCKS_MAX];
+
+ uint8_t bark1[TWINVQ_CHANNELS_MAX][TWINVQ_SUBBLOCKS_MAX][TWINVQ_BARK_N_COEF_MAX];
+ uint8_t bark_use_hist[TWINVQ_CHANNELS_MAX][TWINVQ_SUBBLOCKS_MAX];
+
+ uint8_t lpc_idx1[TWINVQ_CHANNELS_MAX];
+ uint8_t lpc_idx2[TWINVQ_CHANNELS_MAX][TWINVQ_LSP_SPLIT_MAX];
+ uint8_t lpc_hist_idx[TWINVQ_CHANNELS_MAX];
+
+ int p_coef[TWINVQ_CHANNELS_MAX];
+ int g_coef[TWINVQ_CHANNELS_MAX];
+} TwinVQFrameData;
+
+/**
+ * Parameters and tables that are different for every combination of
+ * bitrate/sample rate
+ */
+typedef struct TwinVQModeTab {
+ struct TwinVQFrameMode fmode[3]; ///< frame type-dependant parameters
+
+ uint16_t size; ///< frame size in samples
+ uint8_t n_lsp; ///< number of lsp coefficients
+ const float *lspcodebook;
+
+ /* number of bits of the different LSP CB coefficients */
+ uint8_t lsp_bit0;
+ uint8_t lsp_bit1;
+ uint8_t lsp_bit2;
+
+ uint8_t lsp_split; ///< number of CB entries for the LSP decoding
+ const int16_t *ppc_shape_cb; ///< PPC shape CB
+
+ /** number of the bits for the PPC period value */
+ uint8_t ppc_period_bit;
+
+ uint8_t ppc_shape_bit; ///< number of bits of the PPC shape CB coeffs
+ uint8_t ppc_shape_len; ///< size of PPC shape CB
+ uint8_t pgain_bit; ///< bits for PPC gain
+
+ /** constant for peak period to peak width conversion */
+ uint16_t peak_per2wid;
+} TwinVQModeTab;
+
+typedef struct TwinVQContext {
+ AVCodecContext *avctx;
+ AVFloatDSPContext fdsp;
+ FFTContext mdct_ctx[3];
+
+ const TwinVQModeTab *mtab;
+
+ // history
+ float lsp_hist[2][20]; ///< LSP coefficients of the last frame
+ float bark_hist[3][2][40]; ///< BSE coefficients of last frame
+
+ // bitstream parameters
+ int16_t permut[4][4096];
+ uint8_t length[4][2]; ///< main codebook stride
+ uint8_t length_change[4];
+ uint8_t bits_main_spec[2][4][2]; ///< bits for the main codebook
+ int bits_main_spec_change[4];
+ int n_div[4];
+
+ float *spectrum;
+ float *curr_frame; ///< non-interleaved output
+ float *prev_frame; ///< non-interleaved previous frame
+ int last_block_pos[2];
+ int discarded_packets;
+
+ float *cos_tabs[3];
+
+ // scratch buffers
+ float *tmp_buf;
+
+ TwinVQFrameData bits;
+
+ enum TwinVQCodec codec;
+
+ int (*read_bitstream)(AVCodecContext *avctx, struct TwinVQContext *tctx,
+ const uint8_t *buf, int buf_size);
+ void (*dec_bark_env)(struct TwinVQContext *tctx, const uint8_t *in,
+ int use_hist, int ch, float *out, float gain,
+ enum TwinVQFrameType ftype);
+ void (*decode_ppc)(struct TwinVQContext *tctx, int period_coef, int g_coef,
+ const float *shape, float *speech);
+} TwinVQContext;
+
+extern const enum TwinVQFrameType ff_twinvq_wtype_to_ftype_table[];
+
+/** @note not speed critical, hence not optimized */
+static inline void twinvq_memset_float(float *buf, float val, int size)
+{
+ while (size--)
+ *buf++ = val;
+}
+
+static inline float twinvq_mulawinv(float y, float clip, float mu)
+{
+ y = av_clipf(y / clip, -1, 1);
+ return clip * FFSIGN(y) * (exp(log(1 + mu) * fabs(y)) - 1) / mu;
+}
+
+int ff_twinvq_decode_frame(AVCodecContext *avctx, void *data,
+ int *got_frame_ptr, AVPacket *avpkt);
+av_cold int ff_twinvq_decode_close(AVCodecContext *avctx);
+av_cold int ff_twinvq_decode_init(AVCodecContext *avctx);
+
+#endif /* AVCODEC_TWINVQ_DATA_H */
diff --git a/libavcodec/twinvqdec.c b/libavcodec/twinvqdec.c
new file mode 100644
index 0000000..259a9d6
--- /dev/null
+++ b/libavcodec/twinvqdec.c
@@ -0,0 +1,421 @@
+/*
+ * TwinVQ decoder
+ * Copyright (c) 2009 Vitor Sessak
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <math.h>
+#include <stdint.h>
+
+#include "libavutil/channel_layout.h"
+#include "avcodec.h"
+#include "get_bits.h"
+#include "internal.h"
+#include "twinvq.h"
+#include "twinvq_data.h"
+
+static const TwinVQModeTab mode_08_08 = {
+ {
+ { 8, bark_tab_s08_64, 10, tab.fcb08s, 1, 5, tab.cb0808s0, tab.cb0808s1, 18 },
+ { 2, bark_tab_m08_256, 20, tab.fcb08m, 2, 5, tab.cb0808m0, tab.cb0808m1, 16 },
+ { 1, bark_tab_l08_512, 30, tab.fcb08l, 3, 6, tab.cb0808l0, tab.cb0808l1, 17 }
+ },
+ 512, 12, tab.lsp08, 1, 5, 3, 3, tab.shape08, 8, 28, 20, 6, 40
+};
+
+static const TwinVQModeTab mode_11_08 = {
+ {
+ { 8, bark_tab_s11_64, 10, tab.fcb11s, 1, 5, tab.cb1108s0, tab.cb1108s1, 29 },
+ { 2, bark_tab_m11_256, 20, tab.fcb11m, 2, 5, tab.cb1108m0, tab.cb1108m1, 24 },
+ { 1, bark_tab_l11_512, 30, tab.fcb11l, 3, 6, tab.cb1108l0, tab.cb1108l1, 27 }
+ },
+ 512, 16, tab.lsp11, 1, 6, 4, 3, tab.shape11, 9, 36, 30, 7, 90
+};
+
+static const TwinVQModeTab mode_11_10 = {
+ {
+ { 8, bark_tab_s11_64, 10, tab.fcb11s, 1, 5, tab.cb1110s0, tab.cb1110s1, 21 },
+ { 2, bark_tab_m11_256, 20, tab.fcb11m, 2, 5, tab.cb1110m0, tab.cb1110m1, 18 },
+ { 1, bark_tab_l11_512, 30, tab.fcb11l, 3, 6, tab.cb1110l0, tab.cb1110l1, 20 }
+ },
+ 512, 16, tab.lsp11, 1, 6, 4, 3, tab.shape11, 9, 36, 30, 7, 90
+};
+
+static const TwinVQModeTab mode_16_16 = {
+ {
+ { 8, bark_tab_s16_128, 10, tab.fcb16s, 1, 5, tab.cb1616s0, tab.cb1616s1, 16 },
+ { 2, bark_tab_m16_512, 20, tab.fcb16m, 2, 5, tab.cb1616m0, tab.cb1616m1, 15 },
+ { 1, bark_tab_l16_1024, 30, tab.fcb16l, 3, 6, tab.cb1616l0, tab.cb1616l1, 16 }
+ },
+ 1024, 16, tab.lsp16, 1, 6, 4, 3, tab.shape16, 9, 56, 60, 7, 180
+};
+
+static const TwinVQModeTab mode_22_20 = {
+ {
+ { 8, bark_tab_s22_128, 10, tab.fcb22s_1, 1, 6, tab.cb2220s0, tab.cb2220s1, 18 },
+ { 2, bark_tab_m22_512, 20, tab.fcb22m_1, 2, 6, tab.cb2220m0, tab.cb2220m1, 17 },
+ { 1, bark_tab_l22_1024, 32, tab.fcb22l_1, 4, 6, tab.cb2220l0, tab.cb2220l1, 18 }
+ },
+ 1024, 16, tab.lsp22_1, 1, 6, 4, 3, tab.shape22_1, 9, 56, 36, 7, 144
+};
+
+static const TwinVQModeTab mode_22_24 = {
+ {
+ { 8, bark_tab_s22_128, 10, tab.fcb22s_1, 1, 6, tab.cb2224s0, tab.cb2224s1, 15 },
+ { 2, bark_tab_m22_512, 20, tab.fcb22m_1, 2, 6, tab.cb2224m0, tab.cb2224m1, 14 },
+ { 1, bark_tab_l22_1024, 32, tab.fcb22l_1, 4, 6, tab.cb2224l0, tab.cb2224l1, 15 }
+ },
+ 1024, 16, tab.lsp22_1, 1, 6, 4, 3, tab.shape22_1, 9, 56, 36, 7, 144
+};
+
+static const TwinVQModeTab mode_22_32 = {
+ {
+ { 4, bark_tab_s22_128, 10, tab.fcb22s_2, 1, 6, tab.cb2232s0, tab.cb2232s1, 11 },
+ { 2, bark_tab_m22_256, 20, tab.fcb22m_2, 2, 6, tab.cb2232m0, tab.cb2232m1, 11 },
+ { 1, bark_tab_l22_512, 32, tab.fcb22l_2, 4, 6, tab.cb2232l0, tab.cb2232l1, 12 }
+ },
+ 512, 16, tab.lsp22_2, 1, 6, 4, 4, tab.shape22_2, 9, 56, 36, 7, 72
+};
+
+static const TwinVQModeTab mode_44_40 = {
+ {
+ { 16, bark_tab_s44_128, 10, tab.fcb44s, 1, 6, tab.cb4440s0, tab.cb4440s1, 18 },
+ { 4, bark_tab_m44_512, 20, tab.fcb44m, 2, 6, tab.cb4440m0, tab.cb4440m1, 17 },
+ { 1, bark_tab_l44_2048, 40, tab.fcb44l, 4, 6, tab.cb4440l0, tab.cb4440l1, 17 }
+ },
+ 2048, 20, tab.lsp44, 1, 6, 4, 4, tab.shape44, 9, 84, 54, 7, 432
+};
+
+static const TwinVQModeTab mode_44_48 = {
+ {
+ { 16, bark_tab_s44_128, 10, tab.fcb44s, 1, 6, tab.cb4448s0, tab.cb4448s1, 15 },
+ { 4, bark_tab_m44_512, 20, tab.fcb44m, 2, 6, tab.cb4448m0, tab.cb4448m1, 14 },
+ { 1, bark_tab_l44_2048, 40, tab.fcb44l, 4, 6, tab.cb4448l0, tab.cb4448l1, 14 }
+ },
+ 2048, 20, tab.lsp44, 1, 6, 4, 4, tab.shape44, 9, 84, 54, 7, 432
+};
+
+/**
+ * Evaluate a * b / 400 rounded to the nearest integer. When, for example,
+ * a * b == 200 and the nearest integer is ill-defined, use a table to emulate
+ * the following broken float-based implementation used by the binary decoder:
+ *
+ * @code
+ * static int very_broken_op(int a, int b)
+ * {
+ * static float test; // Ugh, force gcc to do the division first...
+ *
+ * test = a / 400.0;
+ * return b * test + 0.5;
+ * }
+ * @endcode
+ *
+ * @note if this function is replaced by just ROUNDED_DIV(a * b, 400.0), the
+ * stddev between the original file (before encoding with Yamaha encoder) and
+ * the decoded output increases, which leads one to believe that the encoder
+ * expects exactly this broken calculation.
+ */
+static int very_broken_op(int a, int b)
+{
+ int x = a * b + 200;
+ int size;
+ const uint8_t *rtab;
+
+ if (x % 400 || b % 5)
+ return x / 400;
+
+ x /= 400;
+
+ size = tabs[b / 5].size;
+ rtab = tabs[b / 5].tab;
+ return x - rtab[size * av_log2(2 * (x - 1) / size) + (x - 1) % size];
+}
+
+/**
+ * Sum to data a periodic peak of a given period, width and shape.
+ *
+ * @param period the period of the peak divised by 400.0
+ */
+static void add_peak(int period, int width, const float *shape,
+ float ppc_gain, float *speech, int len)
+{
+ int i, j;
+
+ const float *shape_end = shape + len;
+ int center;
+
+ // First peak centered around zero
+ for (i = 0; i < width / 2; i++)
+ speech[i] += ppc_gain * *shape++;
+
+ for (i = 1; i < ROUNDED_DIV(len, width); i++) {
+ center = very_broken_op(period, i);
+ for (j = -width / 2; j < (width + 1) / 2; j++)
+ speech[j + center] += ppc_gain * *shape++;
+ }
+
+ // For the last block, be careful not to go beyond the end of the buffer
+ center = very_broken_op(period, i);
+ for (j = -width / 2; j < (width + 1) / 2 && shape < shape_end; j++)
+ speech[j + center] += ppc_gain * *shape++;
+}
+
+static void decode_ppc(TwinVQContext *tctx, int period_coef, int g_coef,
+ const float *shape, float *speech)
+{
+ const TwinVQModeTab *mtab = tctx->mtab;
+ int isampf = tctx->avctx->sample_rate / 1000;
+ int ibps = tctx->avctx->bit_rate / (1000 * tctx->avctx->channels);
+ int min_period = ROUNDED_DIV(40 * 2 * mtab->size, isampf);
+ int max_period = ROUNDED_DIV(40 * 2 * mtab->size * 6, isampf);
+ int period_range = max_period - min_period;
+ float pgain_step = 25000.0 / ((1 << mtab->pgain_bit) - 1);
+ float ppc_gain = 1.0 / 8192 *
+ twinvq_mulawinv(pgain_step * g_coef +
+ pgain_step / 2,
+ 25000.0, TWINVQ_PGAIN_MU);
+
+ // This is actually the period multiplied by 400. It is just linearly coded
+ // between its maximum and minimum value.
+ int period = min_period +
+ ROUNDED_DIV(period_coef * period_range,
+ (1 << mtab->ppc_period_bit) - 1);
+ int width;
+
+ if (isampf == 22 && ibps == 32) {
+ // For some unknown reason, NTT decided to code this case differently...
+ width = ROUNDED_DIV((period + 800) * mtab->peak_per2wid,
+ 400 * mtab->size);
+ } else
+ width = period * mtab->peak_per2wid / (400 * mtab->size);
+
+ add_peak(period, width, shape, ppc_gain, speech, mtab->ppc_shape_len);
+}
+
+static void dec_bark_env(TwinVQContext *tctx, const uint8_t *in, int use_hist,
+ int ch, float *out, float gain,
+ enum TwinVQFrameType ftype)
+{
+ const TwinVQModeTab *mtab = tctx->mtab;
+ int i, j;
+ float *hist = tctx->bark_hist[ftype][ch];
+ float val = ((const float []) { 0.4, 0.35, 0.28 })[ftype];
+ int bark_n_coef = mtab->fmode[ftype].bark_n_coef;
+ int fw_cb_len = mtab->fmode[ftype].bark_env_size / bark_n_coef;
+ int idx = 0;
+
+ for (i = 0; i < fw_cb_len; i++)
+ for (j = 0; j < bark_n_coef; j++, idx++) {
+ float tmp2 = mtab->fmode[ftype].bark_cb[fw_cb_len * in[j] + i] *
+ (1.0 / 4096);
+ float st = use_hist ? (1.0 - val) * tmp2 + val * hist[idx] + 1.0
+ : tmp2 + 1.0;
+
+ hist[idx] = tmp2;
+ if (st < -1.0)
+ st = 1.0;
+
+ twinvq_memset_float(out, st * gain, mtab->fmode[ftype].bark_tab[idx]);
+ out += mtab->fmode[ftype].bark_tab[idx];
+ }
+}
+
+static void read_cb_data(TwinVQContext *tctx, GetBitContext *gb,
+ uint8_t *dst, enum TwinVQFrameType ftype)
+{
+ int i;
+
+ for (i = 0; i < tctx->n_div[ftype]; i++) {
+ int bs_second_part = (i >= tctx->bits_main_spec_change[ftype]);
+
+ *dst++ = get_bits(gb, tctx->bits_main_spec[0][ftype][bs_second_part]);
+ *dst++ = get_bits(gb, tctx->bits_main_spec[1][ftype][bs_second_part]);
+ }
+}
+
+static int twinvq_read_bitstream(AVCodecContext *avctx, TwinVQContext *tctx,
+ const uint8_t *buf, int buf_size)
+{
+ TwinVQFrameData *bits = &tctx->bits;
+ const TwinVQModeTab *mtab = tctx->mtab;
+ int channels = tctx->avctx->channels;
+ int sub;
+ GetBitContext gb;
+ int i, j, k;
+
+ if (buf_size * 8 < avctx->bit_rate * mtab->size / avctx->sample_rate + 8) {
+ av_log(avctx, AV_LOG_ERROR,
+ "Frame too small (%d bytes). Truncated file?\n", buf_size);
+ return AVERROR(EINVAL);
+ }
+
+ init_get_bits(&gb, buf, buf_size * 8);
+ skip_bits(&gb, get_bits(&gb, 8));
+
+ bits->window_type = get_bits(&gb, TWINVQ_WINDOW_TYPE_BITS);
+
+ if (bits->window_type > 8) {
+ av_log(avctx, AV_LOG_ERROR, "Invalid window type, broken sample?\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ bits->ftype = ff_twinvq_wtype_to_ftype_table[tctx->bits.window_type];
+
+ sub = mtab->fmode[bits->ftype].sub;
+
+ read_cb_data(tctx, &gb, bits->main_coeffs, bits->ftype);
+
+ for (i = 0; i < channels; i++)
+ for (j = 0; j < sub; j++)
+ for (k = 0; k < mtab->fmode[bits->ftype].bark_n_coef; k++)
+ bits->bark1[i][j][k] =
+ get_bits(&gb, mtab->fmode[bits->ftype].bark_n_bit);
+
+ for (i = 0; i < channels; i++)
+ for (j = 0; j < sub; j++)
+ bits->bark_use_hist[i][j] = get_bits1(&gb);
+
+ if (bits->ftype == TWINVQ_FT_LONG) {
+ for (i = 0; i < channels; i++)
+ bits->gain_bits[i] = get_bits(&gb, TWINVQ_GAIN_BITS);
+ } else {
+ for (i = 0; i < channels; i++) {
+ bits->gain_bits[i] = get_bits(&gb, TWINVQ_GAIN_BITS);
+ for (j = 0; j < sub; j++)
+ bits->sub_gain_bits[i * sub + j] = get_bits(&gb,
+ TWINVQ_SUB_GAIN_BITS);
+ }
+ }
+
+ for (i = 0; i < channels; i++) {
+ bits->lpc_hist_idx[i] = get_bits(&gb, mtab->lsp_bit0);
+ bits->lpc_idx1[i] = get_bits(&gb, mtab->lsp_bit1);
+
+ for (j = 0; j < mtab->lsp_split; j++)
+ bits->lpc_idx2[i][j] = get_bits(&gb, mtab->lsp_bit2);
+ }
+
+ if (bits->ftype == TWINVQ_FT_LONG) {
+ read_cb_data(tctx, &gb, bits->ppc_coeffs, 3);
+ for (i = 0; i < channels; i++) {
+ bits->p_coef[i] = get_bits(&gb, mtab->ppc_period_bit);
+ bits->g_coef[i] = get_bits(&gb, mtab->pgain_bit);
+ }
+ }
+
+ return 0;
+}
+
+static av_cold int twinvq_decode_init(AVCodecContext *avctx)
+{
+ int isampf, ibps;
+ TwinVQContext *tctx = avctx->priv_data;
+
+ if (!avctx->extradata || avctx->extradata_size < 12) {
+ av_log(avctx, AV_LOG_ERROR, "Missing or incomplete extradata\n");
+ return AVERROR_INVALIDDATA;
+ }
+ avctx->channels = AV_RB32(avctx->extradata) + 1;
+ avctx->bit_rate = AV_RB32(avctx->extradata + 4) * 1000;
+ isampf = AV_RB32(avctx->extradata + 8);
+
+ if (isampf < 8 || isampf > 44) {
+ av_log(avctx, AV_LOG_ERROR, "Unsupported sample rate\n");
+ return AVERROR_INVALIDDATA;
+ }
+ switch (isampf) {
+ case 44:
+ avctx->sample_rate = 44100;
+ break;
+ case 22:
+ avctx->sample_rate = 22050;
+ break;
+ case 11:
+ avctx->sample_rate = 11025;
+ break;
+ default:
+ avctx->sample_rate = isampf * 1000;
+ break;
+ }
+
+ if (avctx->channels <= 0 || avctx->channels > TWINVQ_CHANNELS_MAX) {
+ av_log(avctx, AV_LOG_ERROR, "Unsupported number of channels: %i\n",
+ avctx->channels);
+ return -1;
+ }
+ avctx->channel_layout = avctx->channels == 1 ? AV_CH_LAYOUT_MONO
+ : AV_CH_LAYOUT_STEREO;
+
+ ibps = avctx->bit_rate / (1000 * avctx->channels);
+
+ switch ((isampf << 8) + ibps) {
+ case (8 << 8) + 8:
+ tctx->mtab = &mode_08_08;
+ break;
+ case (11 << 8) + 8:
+ tctx->mtab = &mode_11_08;
+ break;
+ case (11 << 8) + 10:
+ tctx->mtab = &mode_11_10;
+ break;
+ case (16 << 8) + 16:
+ tctx->mtab = &mode_16_16;
+ break;
+ case (22 << 8) + 20:
+ tctx->mtab = &mode_22_20;
+ break;
+ case (22 << 8) + 24:
+ tctx->mtab = &mode_22_24;
+ break;
+ case (22 << 8) + 32:
+ tctx->mtab = &mode_22_32;
+ break;
+ case (44 << 8) + 40:
+ tctx->mtab = &mode_44_40;
+ break;
+ case (44 << 8) + 48:
+ tctx->mtab = &mode_44_48;
+ break;
+ default:
+ av_log(avctx, AV_LOG_ERROR,
+ "This version does not support %d kHz - %d kbit/s/ch mode.\n",
+ isampf, isampf);
+ return -1;
+ }
+
+ tctx->codec = TWINVQ_CODEC_VQF;
+ tctx->read_bitstream = twinvq_read_bitstream;
+ tctx->dec_bark_env = dec_bark_env;
+ tctx->decode_ppc = decode_ppc;
+
+ return ff_twinvq_decode_init(avctx);
+}
+
+AVCodec ff_twinvq_decoder = {
+ .name = "twinvq",
+ .type = AVMEDIA_TYPE_AUDIO,
+ .id = AV_CODEC_ID_TWINVQ,
+ .priv_data_size = sizeof(TwinVQContext),
+ .init = twinvq_decode_init,
+ .close = ff_twinvq_decode_close,
+ .decode = ff_twinvq_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("VQF TwinVQ"),
+ .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
+ AV_SAMPLE_FMT_NONE },
+};
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