[FFmpeg-cvslog] lowres2 support.
Michael Niedermayer
git at videolan.org
Sun Apr 22 22:41:57 CEST 2012
ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Sun Apr 22 21:37:54 2012 +0200| [70d54392f5015b9c6594fcae558f59f952501e3b] | committer: Michael Niedermayer
lowres2 support.
The new lowres support is limited to decoders where lowres decoding
is possible in high quality.
I was not able to measure any speed difference, but if one is found
the 2-3 lines that might affect speed can be made compile time conditional
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=70d54392f5015b9c6594fcae558f59f952501e3b
---
ffplay.c | 4 +-
libavcodec/alpha/dsputil_alpha.c | 2 +-
libavcodec/arm/dsputil_init_arm.c | 2 +-
libavcodec/arm/dsputil_init_armv5te.c | 2 +-
libavcodec/arm/dsputil_init_armv6.c | 2 +-
libavcodec/arm/dsputil_init_neon.c | 2 +-
libavcodec/avcodec.h | 6 +-
libavcodec/dsputil.c | 122 ++++++++++++++++++-
libavcodec/dsputil.h | 3 +
libavcodec/dv.c | 8 +-
libavcodec/dvdec.c | 3 +-
libavcodec/error_resilience.c | 2 +-
libavcodec/jrevdct.c | 213 +++++++++++++++++++++++++++++++++
libavcodec/libopenjpegdec.c | 1 +
libavcodec/mjpegbdec.c | 1 +
libavcodec/mjpegdec.c | 6 +-
libavcodec/mpegvideo.c | 38 +++---
libavcodec/mpegvideo.h | 2 +-
libavcodec/options_table.h | 1 +
libavcodec/ppc/dsputil_ppc.c | 2 +-
libavcodec/sp5xdec.c | 1 +
libavcodec/utils.c | 7 +-
libavcodec/x86/dsputil_mmx.c | 2 +-
23 files changed, 387 insertions(+), 45 deletions(-)
diff --git a/ffplay.c b/ffplay.c
index 8ee9b0d..4489b34 100644
--- a/ffplay.c
+++ b/ffplay.c
@@ -260,6 +260,7 @@ static int64_t duration = AV_NOPTS_VALUE;
static int workaround_bugs = 1;
static int fast = 0;
static int genpts = 0;
+static int lowres = 0;
static int idct = FF_IDCT_AUTO;
static enum AVDiscard skip_frame = AVDISCARD_DEFAULT;
static enum AVDiscard skip_idct = AVDISCARD_DEFAULT;
@@ -1324,7 +1325,7 @@ static void alloc_picture(void *opaque)
/* SDL allocates a buffer smaller than requested if the video
* overlay hardware is unable to support the requested size. */
fprintf(stderr, "Error: the video system does not support an image\n"
- "size of %dx%d pixels. Try using -vf \"scale=w:h\"\n"
+ "size of %dx%d pixels. Try using -lowres or -vf \"scale=w:h\"\n"
"to reduce the image size.\n", vp->width, vp->height );
do_exit(is);
}
@@ -3084,6 +3085,7 @@ static const OptionDef options[] = {
{ "fast", OPT_BOOL | OPT_EXPERT, { (void*)&fast }, "non spec compliant optimizations", "" },
{ "genpts", OPT_BOOL | OPT_EXPERT, { (void*)&genpts }, "generate pts", "" },
{ "drp", OPT_INT | HAS_ARG | OPT_EXPERT, { (void*)&decoder_reorder_pts }, "let decoder reorder pts 0=off 1=on -1=auto", ""},
+ { "lowres", OPT_INT | HAS_ARG | OPT_EXPERT, { (void*)&lowres }, "", "" },
{ "skiploop", OPT_INT | HAS_ARG | OPT_EXPERT, { (void*)&skip_loop_filter }, "", "" },
{ "skipframe", OPT_INT | HAS_ARG | OPT_EXPERT, { (void*)&skip_frame }, "", "" },
{ "skipidct", OPT_INT | HAS_ARG | OPT_EXPERT, { (void*)&skip_idct }, "", "" },
diff --git a/libavcodec/alpha/dsputil_alpha.c b/libavcodec/alpha/dsputil_alpha.c
index ed9416e..db2464b 100644
--- a/libavcodec/alpha/dsputil_alpha.c
+++ b/libavcodec/alpha/dsputil_alpha.c
@@ -336,7 +336,7 @@ void ff_dsputil_init_alpha(DSPContext* c, AVCodecContext *avctx)
put_pixels_clamped_axp_p = c->put_pixels_clamped;
add_pixels_clamped_axp_p = c->add_pixels_clamped;
- if (avctx->bits_per_raw_sample <= 8 &&
+ if (!avctx->lowres && avctx->bits_per_raw_sample <= 8 &&
(avctx->idct_algo == FF_IDCT_AUTO ||
avctx->idct_algo == FF_IDCT_SIMPLEALPHA)) {
c->idct_put = ff_simple_idct_put_axp;
diff --git a/libavcodec/arm/dsputil_init_arm.c b/libavcodec/arm/dsputil_init_arm.c
index 2bc97bf..03df6b2 100644
--- a/libavcodec/arm/dsputil_init_arm.c
+++ b/libavcodec/arm/dsputil_init_arm.c
@@ -82,7 +82,7 @@ void ff_dsputil_init_arm(DSPContext* c, AVCodecContext *avctx)
ff_put_pixels_clamped = c->put_pixels_clamped;
ff_add_pixels_clamped = c->add_pixels_clamped;
- if (avctx->bits_per_raw_sample <= 8) {
+ if (!avctx->lowres && avctx->bits_per_raw_sample <= 8) {
if(avctx->idct_algo == FF_IDCT_AUTO ||
avctx->idct_algo == FF_IDCT_ARM){
c->idct_put = j_rev_dct_arm_put;
diff --git a/libavcodec/arm/dsputil_init_armv5te.c b/libavcodec/arm/dsputil_init_armv5te.c
index 6b2300b..9fedb7a 100644
--- a/libavcodec/arm/dsputil_init_armv5te.c
+++ b/libavcodec/arm/dsputil_init_armv5te.c
@@ -29,7 +29,7 @@ void ff_prefetch_arm(void *mem, int stride, int h);
av_cold void ff_dsputil_init_armv5te(DSPContext *c, AVCodecContext *avctx)
{
- if (avctx->bits_per_raw_sample <= 8 &&
+ if (!avctx->lowres && avctx->bits_per_raw_sample <= 8 &&
(avctx->idct_algo == FF_IDCT_AUTO ||
avctx->idct_algo == FF_IDCT_SIMPLEARMV5TE)) {
c->idct_put = ff_simple_idct_put_armv5te;
diff --git a/libavcodec/arm/dsputil_init_armv6.c b/libavcodec/arm/dsputil_init_armv6.c
index 8401aac..cd5744d 100644
--- a/libavcodec/arm/dsputil_init_armv6.c
+++ b/libavcodec/arm/dsputil_init_armv6.c
@@ -74,7 +74,7 @@ av_cold void ff_dsputil_init_armv6(DSPContext *c, AVCodecContext *avctx)
{
const int high_bit_depth = avctx->bits_per_raw_sample > 8;
- if (avctx->bits_per_raw_sample <= 8 &&
+ if (!avctx->lowres && avctx->bits_per_raw_sample <= 8 &&
(avctx->idct_algo == FF_IDCT_AUTO ||
avctx->idct_algo == FF_IDCT_SIMPLEARMV6)) {
c->idct_put = ff_simple_idct_put_armv6;
diff --git a/libavcodec/arm/dsputil_init_neon.c b/libavcodec/arm/dsputil_init_neon.c
index 1aa39de..4c73276 100644
--- a/libavcodec/arm/dsputil_init_neon.c
+++ b/libavcodec/arm/dsputil_init_neon.c
@@ -182,7 +182,7 @@ void ff_dsputil_init_neon(DSPContext *c, AVCodecContext *avctx)
{
const int high_bit_depth = avctx->bits_per_raw_sample > 8;
- if (avctx->bits_per_raw_sample <= 8) {
+ if (!avctx->lowres && avctx->bits_per_raw_sample <= 8) {
if (avctx->idct_algo == FF_IDCT_AUTO ||
avctx->idct_algo == FF_IDCT_SIMPLENEON) {
c->idct_put = ff_simple_idct_put_neon;
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 7887f7f..c3a5192 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -1451,7 +1451,7 @@ typedef struct AVCodecContext {
int width, height;
/**
- * Bitstream width / height, may be different from width/height.
+ * Bitstream width / height, may be different from width/height if lowres enabled.
* - encoding: unused
* - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
*/
@@ -2649,7 +2649,7 @@ typedef struct AVCodecContext {
* - encoding: unused
* - decoding: Set by user.
*/
- attribute_deprecated int lowres;
+ int lowres;
/**
* the picture in the bitstream
@@ -2920,7 +2920,7 @@ typedef struct AVCodec {
const int *supported_samplerates; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
const uint64_t *channel_layouts; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
- attribute_deprecated uint8_t max_lowres; ///< maximum value for lowres supported by the decoder
+ uint8_t max_lowres; ///< maximum value for lowres supported by the decoder
const AVClass *priv_class; ///< AVClass for the private context
const AVProfile *profiles; ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
diff --git a/libavcodec/dsputil.c b/libavcodec/dsputil.c
index 553fb8c..a13737d 100644
--- a/libavcodec/dsputil.c
+++ b/libavcodec/dsputil.c
@@ -381,6 +381,38 @@ void ff_put_pixels_clamped_c(const DCTELEM *block, uint8_t *restrict pixels,
}
}
+static void put_pixels_clamped4_c(const DCTELEM *block, uint8_t *restrict pixels,
+ int line_size)
+{
+ int i;
+
+ /* read the pixels */
+ for(i=0;i<4;i++) {
+ pixels[0] = av_clip_uint8(block[0]);
+ pixels[1] = av_clip_uint8(block[1]);
+ pixels[2] = av_clip_uint8(block[2]);
+ pixels[3] = av_clip_uint8(block[3]);
+
+ pixels += line_size;
+ block += 8;
+ }
+}
+
+static void put_pixels_clamped2_c(const DCTELEM *block, uint8_t *restrict pixels,
+ int line_size)
+{
+ int i;
+
+ /* read the pixels */
+ for(i=0;i<2;i++) {
+ pixels[0] = av_clip_uint8(block[0]);
+ pixels[1] = av_clip_uint8(block[1]);
+
+ pixels += line_size;
+ block += 8;
+ }
+}
+
void ff_put_signed_pixels_clamped_c(const DCTELEM *block,
uint8_t *restrict pixels,
int line_size)
@@ -422,6 +454,36 @@ void ff_add_pixels_clamped_c(const DCTELEM *block, uint8_t *restrict pixels,
}
}
+static void add_pixels_clamped4_c(const DCTELEM *block, uint8_t *restrict pixels,
+ int line_size)
+{
+ int i;
+
+ /* read the pixels */
+ for(i=0;i<4;i++) {
+ pixels[0] = av_clip_uint8(pixels[0] + block[0]);
+ pixels[1] = av_clip_uint8(pixels[1] + block[1]);
+ pixels[2] = av_clip_uint8(pixels[2] + block[2]);
+ pixels[3] = av_clip_uint8(pixels[3] + block[3]);
+ pixels += line_size;
+ block += 8;
+ }
+}
+
+static void add_pixels_clamped2_c(const DCTELEM *block, uint8_t *restrict pixels,
+ int line_size)
+{
+ int i;
+
+ /* read the pixels */
+ for(i=0;i<2;i++) {
+ pixels[0] = av_clip_uint8(pixels[0] + block[0]);
+ pixels[1] = av_clip_uint8(pixels[1] + block[1]);
+ pixels += line_size;
+ block += 8;
+ }
+}
+
static int sum_abs_dctelem_c(DCTELEM *block)
{
int sum=0, i;
@@ -2684,6 +2746,37 @@ static void ff_jref_idct_add(uint8_t *dest, int line_size, DCTELEM *block)
ff_add_pixels_clamped_c(block, dest, line_size);
}
+static void ff_jref_idct4_put(uint8_t *dest, int line_size, DCTELEM *block)
+{
+ ff_j_rev_dct4 (block);
+ put_pixels_clamped4_c(block, dest, line_size);
+}
+static void ff_jref_idct4_add(uint8_t *dest, int line_size, DCTELEM *block)
+{
+ ff_j_rev_dct4 (block);
+ add_pixels_clamped4_c(block, dest, line_size);
+}
+
+static void ff_jref_idct2_put(uint8_t *dest, int line_size, DCTELEM *block)
+{
+ ff_j_rev_dct2 (block);
+ put_pixels_clamped2_c(block, dest, line_size);
+}
+static void ff_jref_idct2_add(uint8_t *dest, int line_size, DCTELEM *block)
+{
+ ff_j_rev_dct2 (block);
+ add_pixels_clamped2_c(block, dest, line_size);
+}
+
+static void ff_jref_idct1_put(uint8_t *dest, int line_size, DCTELEM *block)
+{
+ dest[0] = av_clip_uint8((block[0] + 4)>>3);
+}
+static void ff_jref_idct1_add(uint8_t *dest, int line_size, DCTELEM *block)
+{
+ dest[0] = av_clip_uint8(dest[0] + ((block[0] + 4)>>3));
+}
+
static void just_return(void *mem av_unused, int stride av_unused, int h av_unused) { return; }
/* init static data */
@@ -2750,12 +2843,28 @@ av_cold void ff_dsputil_init(DSPContext* c, AVCodecContext *avctx)
}
#endif //CONFIG_ENCODERS
- if (avctx->bits_per_raw_sample == 10) {
- c->idct_put = ff_simple_idct_put_10;
- c->idct_add = ff_simple_idct_add_10;
- c->idct = ff_simple_idct_10;
- c->idct_permutation_type = FF_NO_IDCT_PERM;
- } else {
+ if(avctx->lowres==1){
+ c->idct_put= ff_jref_idct4_put;
+ c->idct_add= ff_jref_idct4_add;
+ c->idct = ff_j_rev_dct4;
+ c->idct_permutation_type= FF_NO_IDCT_PERM;
+ }else if(avctx->lowres==2){
+ c->idct_put= ff_jref_idct2_put;
+ c->idct_add= ff_jref_idct2_add;
+ c->idct = ff_j_rev_dct2;
+ c->idct_permutation_type= FF_NO_IDCT_PERM;
+ }else if(avctx->lowres==3){
+ c->idct_put= ff_jref_idct1_put;
+ c->idct_add= ff_jref_idct1_add;
+ c->idct = ff_j_rev_dct1;
+ c->idct_permutation_type= FF_NO_IDCT_PERM;
+ }else{
+ if (avctx->bits_per_raw_sample == 10) {
+ c->idct_put = ff_simple_idct_put_10;
+ c->idct_add = ff_simple_idct_add_10;
+ c->idct = ff_simple_idct_10;
+ c->idct_permutation_type = FF_NO_IDCT_PERM;
+ } else {
if(avctx->idct_algo==FF_IDCT_INT){
c->idct_put= ff_jref_idct_put;
c->idct_add= ff_jref_idct_add;
@@ -2786,6 +2895,7 @@ av_cold void ff_dsputil_init(DSPContext* c, AVCodecContext *avctx)
c->idct = ff_simple_idct_8;
c->idct_permutation_type= FF_NO_IDCT_PERM;
}
+ }
}
c->diff_pixels = diff_pixels_c;
diff --git a/libavcodec/dsputil.h b/libavcodec/dsputil.h
index 60bc53e..34d659d 100644
--- a/libavcodec/dsputil.h
+++ b/libavcodec/dsputil.h
@@ -46,6 +46,9 @@ void ff_fdct248_islow_8(DCTELEM *data);
void ff_fdct248_islow_10(DCTELEM *data);
void ff_j_rev_dct (DCTELEM *data);
+void ff_j_rev_dct4 (DCTELEM *data);
+void ff_j_rev_dct2 (DCTELEM *data);
+void ff_j_rev_dct1 (DCTELEM *data);
void ff_wmv2_idct_c(DCTELEM *data);
void ff_fdct_mmx(DCTELEM *block);
diff --git a/libavcodec/dv.c b/libavcodec/dv.c
index e130266..5bb8479 100644
--- a/libavcodec/dv.c
+++ b/libavcodec/dv.c
@@ -311,7 +311,13 @@ av_cold int ff_dvvideo_init(AVCodecContext *avctx)
/* 248DCT setup */
s->fdct[1] = dsp.fdct248;
s->idct_put[1] = ff_simple_idct248_put; // FIXME: need to add it to DSP
- memcpy(s->dv_zigzag[1], ff_zigzag248_direct, 64);
+ if (avctx->lowres){
+ for (i = 0; i < 64; i++){
+ int j = ff_zigzag248_direct[i];
+ s->dv_zigzag[1][i] = dsp.idct_permutation[(j & 7) + (j & 8) * 4 + (j & 48) / 2];
+ }
+ }else
+ memcpy(s->dv_zigzag[1], ff_zigzag248_direct, 64);
avctx->coded_frame = &s->picture;
s->avctx = avctx;
diff --git a/libavcodec/dvdec.c b/libavcodec/dvdec.c
index f0fa5e9..4e09d0d 100644
--- a/libavcodec/dvdec.c
+++ b/libavcodec/dvdec.c
@@ -144,7 +144,7 @@ static int dv_decode_video_segment(AVCodecContext *avctx, void *arg)
LOCAL_ALIGNED_16(DCTELEM, sblock, [5*DV_MAX_BPM], [64]);
LOCAL_ALIGNED_16(uint8_t, mb_bit_buffer, [ 80 + FF_INPUT_BUFFER_PADDING_SIZE]); /* allow some slack */
LOCAL_ALIGNED_16(uint8_t, vs_bit_buffer, [5*80 + FF_INPUT_BUFFER_PADDING_SIZE]); /* allow some slack */
- const int log2_blocksize = 3;
+ const int log2_blocksize = 3-s->avctx->lowres;
int is_field_mode[5];
assert((((int)mb_bit_buffer) & 7) == 0);
@@ -382,5 +382,6 @@ AVCodec ff_dvvideo_decoder = {
.close = dvvideo_close,
.decode = dvvideo_decode_frame,
.capabilities = CODEC_CAP_DR1 | CODEC_CAP_SLICE_THREADS,
+ .max_lowres = 3,
.long_name = NULL_IF_CONFIG_SMALL("DV (Digital Video)"),
};
diff --git a/libavcodec/error_resilience.c b/libavcodec/error_resilience.c
index a8ea647..2691109 100644
--- a/libavcodec/error_resilience.c
+++ b/libavcodec/error_resilience.c
@@ -907,7 +907,7 @@ void ff_er_frame_end(MpegEncContext *s)
/* We do not support ER of field pictures yet,
* though it should not crash if enabled. */
- if (!s->err_recognition || s->error_count == 0 ||
+ if (!s->err_recognition || s->error_count == 0 || s->avctx->lowres ||
s->avctx->hwaccel ||
s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU ||
s->picture_structure != PICT_FRAME ||
diff --git a/libavcodec/jrevdct.c b/libavcodec/jrevdct.c
index e33558f..395eb8c 100644
--- a/libavcodec/jrevdct.c
+++ b/libavcodec/jrevdct.c
@@ -940,3 +940,216 @@ void ff_j_rev_dct(DCTBLOCK data)
dataptr++; /* advance pointer to next column */
}
}
+
+#undef DCTSIZE
+#define DCTSIZE 4
+#define DCTSTRIDE 8
+
+void ff_j_rev_dct4(DCTBLOCK data)
+{
+ int32_t tmp0, tmp1, tmp2, tmp3;
+ int32_t tmp10, tmp11, tmp12, tmp13;
+ int32_t z1;
+ int32_t d0, d2, d4, d6;
+ register DCTELEM *dataptr;
+ int rowctr;
+
+ /* Pass 1: process rows. */
+ /* Note results are scaled up by sqrt(8) compared to a true IDCT; */
+ /* furthermore, we scale the results by 2**PASS1_BITS. */
+
+ data[0] += 4;
+
+ dataptr = data;
+
+ for (rowctr = DCTSIZE-1; rowctr >= 0; rowctr--) {
+ /* Due to quantization, we will usually find that many of the input
+ * coefficients are zero, especially the AC terms. We can exploit this
+ * by short-circuiting the IDCT calculation for any row in which all
+ * the AC terms are zero. In that case each output is equal to the
+ * DC coefficient (with scale factor as needed).
+ * With typical images and quantization tables, half or more of the
+ * row DCT calculations can be simplified this way.
+ */
+
+ register int *idataptr = (int*)dataptr;
+
+ d0 = dataptr[0];
+ d2 = dataptr[1];
+ d4 = dataptr[2];
+ d6 = dataptr[3];
+
+ if ((d2 | d4 | d6) == 0) {
+ /* AC terms all zero */
+ if (d0) {
+ /* Compute a 32 bit value to assign. */
+ DCTELEM dcval = (DCTELEM) (d0 << PASS1_BITS);
+ register int v = (dcval & 0xffff) | ((dcval << 16) & 0xffff0000);
+
+ idataptr[0] = v;
+ idataptr[1] = v;
+ }
+
+ dataptr += DCTSTRIDE; /* advance pointer to next row */
+ continue;
+ }
+
+ /* Even part: reverse the even part of the forward DCT. */
+ /* The rotator is sqrt(2)*c(-6). */
+ if (d6) {
+ if (d2) {
+ /* d0 != 0, d2 != 0, d4 != 0, d6 != 0 */
+ z1 = MULTIPLY(d2 + d6, FIX_0_541196100);
+ tmp2 = z1 + MULTIPLY(-d6, FIX_1_847759065);
+ tmp3 = z1 + MULTIPLY(d2, FIX_0_765366865);
+
+ tmp0 = (d0 + d4) << CONST_BITS;
+ tmp1 = (d0 - d4) << CONST_BITS;
+
+ tmp10 = tmp0 + tmp3;
+ tmp13 = tmp0 - tmp3;
+ tmp11 = tmp1 + tmp2;
+ tmp12 = tmp1 - tmp2;
+ } else {
+ /* d0 != 0, d2 == 0, d4 != 0, d6 != 0 */
+ tmp2 = MULTIPLY(-d6, FIX_1_306562965);
+ tmp3 = MULTIPLY(d6, FIX_0_541196100);
+
+ tmp0 = (d0 + d4) << CONST_BITS;
+ tmp1 = (d0 - d4) << CONST_BITS;
+
+ tmp10 = tmp0 + tmp3;
+ tmp13 = tmp0 - tmp3;
+ tmp11 = tmp1 + tmp2;
+ tmp12 = tmp1 - tmp2;
+ }
+ } else {
+ if (d2) {
+ /* d0 != 0, d2 != 0, d4 != 0, d6 == 0 */
+ tmp2 = MULTIPLY(d2, FIX_0_541196100);
+ tmp3 = MULTIPLY(d2, FIX_1_306562965);
+
+ tmp0 = (d0 + d4) << CONST_BITS;
+ tmp1 = (d0 - d4) << CONST_BITS;
+
+ tmp10 = tmp0 + tmp3;
+ tmp13 = tmp0 - tmp3;
+ tmp11 = tmp1 + tmp2;
+ tmp12 = tmp1 - tmp2;
+ } else {
+ /* d0 != 0, d2 == 0, d4 != 0, d6 == 0 */
+ tmp10 = tmp13 = (d0 + d4) << CONST_BITS;
+ tmp11 = tmp12 = (d0 - d4) << CONST_BITS;
+ }
+ }
+
+ /* Final output stage: inputs are tmp10..tmp13, tmp0..tmp3 */
+
+ dataptr[0] = (DCTELEM) DESCALE(tmp10, CONST_BITS-PASS1_BITS);
+ dataptr[1] = (DCTELEM) DESCALE(tmp11, CONST_BITS-PASS1_BITS);
+ dataptr[2] = (DCTELEM) DESCALE(tmp12, CONST_BITS-PASS1_BITS);
+ dataptr[3] = (DCTELEM) DESCALE(tmp13, CONST_BITS-PASS1_BITS);
+
+ dataptr += DCTSTRIDE; /* advance pointer to next row */
+ }
+
+ /* Pass 2: process columns. */
+ /* Note that we must descale the results by a factor of 8 == 2**3, */
+ /* and also undo the PASS1_BITS scaling. */
+
+ dataptr = data;
+ for (rowctr = DCTSIZE-1; rowctr >= 0; rowctr--) {
+ /* Columns of zeroes can be exploited in the same way as we did with rows.
+ * However, the row calculation has created many nonzero AC terms, so the
+ * simplification applies less often (typically 5% to 10% of the time).
+ * On machines with very fast multiplication, it's possible that the
+ * test takes more time than it's worth. In that case this section
+ * may be commented out.
+ */
+
+ d0 = dataptr[DCTSTRIDE*0];
+ d2 = dataptr[DCTSTRIDE*1];
+ d4 = dataptr[DCTSTRIDE*2];
+ d6 = dataptr[DCTSTRIDE*3];
+
+ /* Even part: reverse the even part of the forward DCT. */
+ /* The rotator is sqrt(2)*c(-6). */
+ if (d6) {
+ if (d2) {
+ /* d0 != 0, d2 != 0, d4 != 0, d6 != 0 */
+ z1 = MULTIPLY(d2 + d6, FIX_0_541196100);
+ tmp2 = z1 + MULTIPLY(-d6, FIX_1_847759065);
+ tmp3 = z1 + MULTIPLY(d2, FIX_0_765366865);
+
+ tmp0 = (d0 + d4) << CONST_BITS;
+ tmp1 = (d0 - d4) << CONST_BITS;
+
+ tmp10 = tmp0 + tmp3;
+ tmp13 = tmp0 - tmp3;
+ tmp11 = tmp1 + tmp2;
+ tmp12 = tmp1 - tmp2;
+ } else {
+ /* d0 != 0, d2 == 0, d4 != 0, d6 != 0 */
+ tmp2 = MULTIPLY(-d6, FIX_1_306562965);
+ tmp3 = MULTIPLY(d6, FIX_0_541196100);
+
+ tmp0 = (d0 + d4) << CONST_BITS;
+ tmp1 = (d0 - d4) << CONST_BITS;
+
+ tmp10 = tmp0 + tmp3;
+ tmp13 = tmp0 - tmp3;
+ tmp11 = tmp1 + tmp2;
+ tmp12 = tmp1 - tmp2;
+ }
+ } else {
+ if (d2) {
+ /* d0 != 0, d2 != 0, d4 != 0, d6 == 0 */
+ tmp2 = MULTIPLY(d2, FIX_0_541196100);
+ tmp3 = MULTIPLY(d2, FIX_1_306562965);
+
+ tmp0 = (d0 + d4) << CONST_BITS;
+ tmp1 = (d0 - d4) << CONST_BITS;
+
+ tmp10 = tmp0 + tmp3;
+ tmp13 = tmp0 - tmp3;
+ tmp11 = tmp1 + tmp2;
+ tmp12 = tmp1 - tmp2;
+ } else {
+ /* d0 != 0, d2 == 0, d4 != 0, d6 == 0 */
+ tmp10 = tmp13 = (d0 + d4) << CONST_BITS;
+ tmp11 = tmp12 = (d0 - d4) << CONST_BITS;
+ }
+ }
+
+ /* Final output stage: inputs are tmp10..tmp13, tmp0..tmp3 */
+
+ dataptr[DCTSTRIDE*0] = tmp10 >> (CONST_BITS+PASS1_BITS+3);
+ dataptr[DCTSTRIDE*1] = tmp11 >> (CONST_BITS+PASS1_BITS+3);
+ dataptr[DCTSTRIDE*2] = tmp12 >> (CONST_BITS+PASS1_BITS+3);
+ dataptr[DCTSTRIDE*3] = tmp13 >> (CONST_BITS+PASS1_BITS+3);
+
+ dataptr++; /* advance pointer to next column */
+ }
+}
+
+void ff_j_rev_dct2(DCTBLOCK data){
+ int d00, d01, d10, d11;
+
+ data[0] += 4;
+ d00 = data[0+0*DCTSTRIDE] + data[1+0*DCTSTRIDE];
+ d01 = data[0+0*DCTSTRIDE] - data[1+0*DCTSTRIDE];
+ d10 = data[0+1*DCTSTRIDE] + data[1+1*DCTSTRIDE];
+ d11 = data[0+1*DCTSTRIDE] - data[1+1*DCTSTRIDE];
+
+ data[0+0*DCTSTRIDE]= (d00 + d10)>>3;
+ data[1+0*DCTSTRIDE]= (d01 + d11)>>3;
+ data[0+1*DCTSTRIDE]= (d00 - d10)>>3;
+ data[1+1*DCTSTRIDE]= (d01 - d11)>>3;
+}
+
+void ff_j_rev_dct1(DCTBLOCK data){
+ data[0] = (data[0] + 4)>>3;
+}
+
+#undef FIX
+#undef CONST_BITS
diff --git a/libavcodec/libopenjpegdec.c b/libavcodec/libopenjpegdec.c
index 5b09b34..abfe730 100644
--- a/libavcodec/libopenjpegdec.c
+++ b/libavcodec/libopenjpegdec.c
@@ -286,6 +286,7 @@ static int libopenjpeg_decode_frame(AVCodecContext *avctx,
}
ctx->dec_params.cp_limit_decoding = NO_LIMITATION;
+ ctx->dec_params.cp_reduce = avctx->lowres;
// Tie decoder with decoding parameters
opj_setup_decoder(dec, &ctx->dec_params);
stream = opj_cio_open((opj_common_ptr)dec, buf, buf_size);
diff --git a/libavcodec/mjpegbdec.c b/libavcodec/mjpegbdec.c
index 540e984..c457b98 100644
--- a/libavcodec/mjpegbdec.c
+++ b/libavcodec/mjpegbdec.c
@@ -161,5 +161,6 @@ AVCodec ff_mjpegb_decoder = {
.close = ff_mjpeg_decode_end,
.decode = mjpegb_decode_frame,
.capabilities = CODEC_CAP_DR1,
+ .max_lowres = 3,
.long_name = NULL_IF_CONFIG_SMALL("Apple MJPEG-B"),
};
diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c
index 330f4f5..a841384 100644
--- a/libavcodec/mjpegdec.c
+++ b/libavcodec/mjpegdec.c
@@ -1003,8 +1003,8 @@ static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
x = 0;
y = 0;
for (j = 0; j < n; j++) {
- block_offset = ((linesize[c] * (v * mb_y + y) * 8) +
- (h * mb_x + x) * 8);
+ block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
+ (h * mb_x + x) * 8) >> s->avctx->lowres);
if (s->interlaced && s->bottom_field)
block_offset += linesize[c] >> 1;
@@ -1814,6 +1814,7 @@ AVCodec ff_mjpeg_decoder = {
.close = ff_mjpeg_decode_end,
.decode = ff_mjpeg_decode_frame,
.capabilities = CODEC_CAP_DR1,
+ .max_lowres = 3,
.long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
.priv_class = &mjpegdec_class,
};
@@ -1827,5 +1828,6 @@ AVCodec ff_thp_decoder = {
.close = ff_mjpeg_decode_end,
.decode = ff_mjpeg_decode_frame,
.capabilities = CODEC_CAP_DR1,
+ .max_lowres = 3,
.long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
};
diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
index d8c28e3..0383992 100644
--- a/libavcodec/mpegvideo.c
+++ b/libavcodec/mpegvideo.c
@@ -1938,8 +1938,8 @@ void MPV_decode_mb_internal(MpegEncContext *s, DCTELEM block[12][64],
qpel_mc_func (*op_qpix)[16];
const int linesize = s->current_picture.f.linesize[0]; //not s->linesize as this would be wrong for field pics
const int uvlinesize = s->current_picture.f.linesize[1];
- const int readable= s->pict_type != AV_PICTURE_TYPE_B || s->encoding || s->avctx->draw_horiz_band;
- const int block_size = 8;
+ const int readable= s->pict_type != AV_PICTURE_TYPE_B || s->encoding || s->avctx->draw_horiz_band || s->avctx->lowres;
+ const int block_size= 8 >> s->avctx->lowres;
/* avoid copy if macroblock skipped in last frame too */
/* skip only during decoding as we might trash the buffers during encoding a bit */
@@ -2016,9 +2016,9 @@ void MPV_decode_mb_internal(MpegEncContext *s, DCTELEM block[12][64],
if(s->encoding || !( s->msmpeg4_version || s->codec_id==CODEC_ID_MPEG1VIDEO || s->codec_id==CODEC_ID_MPEG2VIDEO
|| (s->codec_id==CODEC_ID_MPEG4 && !s->mpeg_quant))){
add_dequant_dct(s, block[0], 0, dest_y , dct_linesize, s->qscale);
- add_dequant_dct(s, block[1], 1, dest_y + block_size, dct_linesize, s->qscale);
+ add_dequant_dct(s, block[1], 1, dest_y + 8 , dct_linesize, s->qscale);
add_dequant_dct(s, block[2], 2, dest_y + dct_offset , dct_linesize, s->qscale);
- add_dequant_dct(s, block[3], 3, dest_y + dct_offset + block_size, dct_linesize, s->qscale);
+ add_dequant_dct(s, block[3], 3, dest_y + dct_offset + 8 , dct_linesize, s->qscale);
if(!CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
if (s->chroma_y_shift){
@@ -2035,9 +2035,9 @@ void MPV_decode_mb_internal(MpegEncContext *s, DCTELEM block[12][64],
}
} else if(is_mpeg12 || (s->codec_id != CODEC_ID_WMV2)){
add_dct(s, block[0], 0, dest_y , dct_linesize);
- add_dct(s, block[1], 1, dest_y + block_size, dct_linesize);
+ add_dct(s, block[1], 1, dest_y + 8 , dct_linesize);
add_dct(s, block[2], 2, dest_y + dct_offset , dct_linesize);
- add_dct(s, block[3], 3, dest_y + dct_offset + block_size, dct_linesize);
+ add_dct(s, block[3], 3, dest_y + dct_offset + 8 , dct_linesize);
if(!CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
if(s->chroma_y_shift){//Chroma420
@@ -2046,17 +2046,17 @@ void MPV_decode_mb_internal(MpegEncContext *s, DCTELEM block[12][64],
}else{
//chroma422
dct_linesize = uvlinesize << s->interlaced_dct;
- dct_offset = s->interlaced_dct ? uvlinesize : uvlinesize*block_size;
+ dct_offset = s->interlaced_dct ? uvlinesize : uvlinesize*8;
add_dct(s, block[4], 4, dest_cb, dct_linesize);
add_dct(s, block[5], 5, dest_cr, dct_linesize);
add_dct(s, block[6], 6, dest_cb+dct_offset, dct_linesize);
add_dct(s, block[7], 7, dest_cr+dct_offset, dct_linesize);
if(!s->chroma_x_shift){//Chroma444
- add_dct(s, block[8], 8, dest_cb+block_size, dct_linesize);
- add_dct(s, block[9], 9, dest_cr+block_size, dct_linesize);
- add_dct(s, block[10], 10, dest_cb+block_size+dct_offset, dct_linesize);
- add_dct(s, block[11], 11, dest_cr+block_size+dct_offset, dct_linesize);
+ add_dct(s, block[8], 8, dest_cb+8, dct_linesize);
+ add_dct(s, block[9], 9, dest_cr+8, dct_linesize);
+ add_dct(s, block[10], 10, dest_cb+8+dct_offset, dct_linesize);
+ add_dct(s, block[11], 11, dest_cr+8+dct_offset, dct_linesize);
}
}
}//fi gray
@@ -2087,9 +2087,9 @@ void MPV_decode_mb_internal(MpegEncContext *s, DCTELEM block[12][64],
}
}else{
s->dsp.idct_put(dest_y , dct_linesize, block[0]);
- s->dsp.idct_put(dest_y + block_size, dct_linesize, block[1]);
+ s->dsp.idct_put(dest_y + 8 , dct_linesize, block[1]);
s->dsp.idct_put(dest_y + dct_offset , dct_linesize, block[2]);
- s->dsp.idct_put(dest_y + dct_offset + block_size, dct_linesize, block[3]);
+ s->dsp.idct_put(dest_y + dct_offset + 8 , dct_linesize, block[3]);
if(!CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
if(s->chroma_y_shift){
@@ -2098,17 +2098,17 @@ void MPV_decode_mb_internal(MpegEncContext *s, DCTELEM block[12][64],
}else{
dct_linesize = uvlinesize << s->interlaced_dct;
- dct_offset = s->interlaced_dct? uvlinesize : uvlinesize*block_size;
+ dct_offset = s->interlaced_dct? uvlinesize : uvlinesize*8;
s->dsp.idct_put(dest_cb, dct_linesize, block[4]);
s->dsp.idct_put(dest_cr, dct_linesize, block[5]);
s->dsp.idct_put(dest_cb + dct_offset, dct_linesize, block[6]);
s->dsp.idct_put(dest_cr + dct_offset, dct_linesize, block[7]);
if(!s->chroma_x_shift){//Chroma444
- s->dsp.idct_put(dest_cb + block_size, dct_linesize, block[8]);
- s->dsp.idct_put(dest_cr + block_size, dct_linesize, block[9]);
- s->dsp.idct_put(dest_cb + block_size + dct_offset, dct_linesize, block[10]);
- s->dsp.idct_put(dest_cr + block_size + dct_offset, dct_linesize, block[11]);
+ s->dsp.idct_put(dest_cb + 8, dct_linesize, block[8]);
+ s->dsp.idct_put(dest_cr + 8, dct_linesize, block[9]);
+ s->dsp.idct_put(dest_cb + 8 + dct_offset, dct_linesize, block[10]);
+ s->dsp.idct_put(dest_cr + 8 + dct_offset, dct_linesize, block[11]);
}
}
}//gray
@@ -2204,7 +2204,7 @@ void ff_draw_horiz_band(MpegEncContext *s, int y, int h){
void ff_init_block_index(MpegEncContext *s){ //FIXME maybe rename
const int linesize = s->current_picture.f.linesize[0]; //not s->linesize as this would be wrong for field pics
const int uvlinesize = s->current_picture.f.linesize[1];
- const int mb_size= 4;
+ const int mb_size= 4 - s->avctx->lowres;
s->block_index[0]= s->b8_stride*(s->mb_y*2 ) - 2 + s->mb_x*2;
s->block_index[1]= s->b8_stride*(s->mb_y*2 ) - 1 + s->mb_x*2;
diff --git a/libavcodec/mpegvideo.h b/libavcodec/mpegvideo.h
index b1fffda..fc3038e 100644
--- a/libavcodec/mpegvideo.h
+++ b/libavcodec/mpegvideo.h
@@ -793,7 +793,7 @@ extern const enum PixelFormat ff_pixfmt_list_420[];
extern const enum PixelFormat ff_hwaccel_pixfmt_list_420[];
static inline void ff_update_block_index(MpegEncContext *s){
- const int block_size = 8;
+ const int block_size= 8 >> s->avctx->lowres;
s->block_index[0]+=2;
s->block_index[1]+=2;
diff --git a/libavcodec/options_table.h b/libavcodec/options_table.h
index acfbbff..c4d4277 100644
--- a/libavcodec/options_table.h
+++ b/libavcodec/options_table.h
@@ -326,6 +326,7 @@ static const AVOption options[]={
{"dts_hd_ma", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_PROFILE_DTS_HD_MA }, INT_MIN, INT_MAX, A|E, "profile"},
{"level", NULL, OFFSET(level), AV_OPT_TYPE_INT, {.dbl = FF_LEVEL_UNKNOWN }, INT_MIN, INT_MAX, V|A|E, "level"},
{"unknown", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_LEVEL_UNKNOWN }, INT_MIN, INT_MAX, V|A|E, "level"},
+{"lowres", "decode at 1= 1/2, 2=1/4, 3=1/8 resolutions", OFFSET(lowres), AV_OPT_TYPE_INT, {.dbl = 0 }, 0, INT_MAX, V|A|D},
{"skip_threshold", "frame skip threshold", OFFSET(frame_skip_threshold), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},
{"skip_factor", "frame skip factor", OFFSET(frame_skip_factor), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},
{"skip_exp", "frame skip exponent", OFFSET(frame_skip_exp), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},
diff --git a/libavcodec/ppc/dsputil_ppc.c b/libavcodec/ppc/dsputil_ppc.c
index 0b89277..195aa20 100644
--- a/libavcodec/ppc/dsputil_ppc.c
+++ b/libavcodec/ppc/dsputil_ppc.c
@@ -187,7 +187,7 @@ void ff_dsputil_init_ppc(DSPContext* c, AVCodecContext *avctx)
}
#endif //CONFIG_ENCODERS
- if (avctx->bits_per_raw_sample <= 8) {
+ if (avctx->lowres == 0 && avctx->bits_per_raw_sample <= 8) {
if ((avctx->idct_algo == FF_IDCT_AUTO) ||
(avctx->idct_algo == FF_IDCT_ALTIVEC)) {
c->idct_put = ff_idct_put_altivec;
diff --git a/libavcodec/sp5xdec.c b/libavcodec/sp5xdec.c
index 88e1ce6..4aca0cc 100644
--- a/libavcodec/sp5xdec.c
+++ b/libavcodec/sp5xdec.c
@@ -102,6 +102,7 @@ AVCodec ff_sp5x_decoder = {
.close = ff_mjpeg_decode_end,
.decode = sp5x_decode_frame,
.capabilities = CODEC_CAP_DR1,
+ .max_lowres = 3,
.long_name = NULL_IF_CONFIG_SMALL("Sunplus JPEG (SP5X)"),
};
diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index 5af3515..bd97431 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -149,8 +149,8 @@ unsigned avcodec_get_edge_width(void)
void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
s->coded_width = width;
s->coded_height= height;
- s->width = width;
- s->height = height;
+ s->width = -((-width )>>s->lowres);
+ s->height= -((-height)>>s->lowres);
}
#define INTERNAL_BUFFER_SIZE (32+1)
@@ -239,8 +239,9 @@ void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
*width = FFALIGN(*width , w_align);
*height= FFALIGN(*height, h_align);
- if (s->codec_id == CODEC_ID_H264)
+ if(s->codec_id == CODEC_ID_H264 || s->lowres)
*height+=2; // some of the optimized chroma MC reads one line too much
+ // which is also done in mpeg decoders with lowres > 0
for (i = 0; i < 4; i++)
linesize_align[i] = STRIDE_ALIGN;
diff --git a/libavcodec/x86/dsputil_mmx.c b/libavcodec/x86/dsputil_mmx.c
index 7d9a152..4c96d62 100644
--- a/libavcodec/x86/dsputil_mmx.c
+++ b/libavcodec/x86/dsputil_mmx.c
@@ -3203,7 +3203,7 @@ void ff_dsputil_init_mmx(DSPContext *c, AVCodecContext *avctx)
if (mm_flags & AV_CPU_FLAG_MMX) {
const int idct_algo = avctx->idct_algo;
- if (avctx->bits_per_raw_sample <= 8) {
+ if (avctx->lowres == 0 && avctx->bits_per_raw_sample <= 8) {
if (idct_algo == FF_IDCT_AUTO || idct_algo == FF_IDCT_SIMPLEMMX) {
c->idct_put = ff_simple_idct_put_mmx;
c->idct_add = ff_simple_idct_add_mmx;
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