[FFmpeg-devel] [PATCH 1/2] Extend WavPack demuxer and decoder to support >2 channel audio
Kostya
kostya.shishkov
Sat Jan 22 15:43:15 CET 2011
---
libavcodec/wavpack.c | 266 ++++++++++++++++++++++++++++++++++++++++----------
libavformat/wv.c | 124 ++++++++++++++++++++---
2 files changed, 324 insertions(+), 66 deletions(-)
diff --git a/libavcodec/wavpack.c b/libavcodec/wavpack.c
index f78492c..4b27403 100644
--- a/libavcodec/wavpack.c
+++ b/libavcodec/wavpack.c
@@ -1,6 +1,6 @@
/*
* WavPack lossless audio decoder
- * Copyright (c) 2006 Konstantin Shishkov
+ * Copyright (c) 2006,2011 Konstantin Shishkov
*
* This file is part of FFmpeg.
*
@@ -91,7 +91,7 @@ typedef struct WvChannel {
int bitrate_acc, bitrate_delta;
} WvChannel;
-typedef struct WavpackContext {
+typedef struct WavpackFrameContext {
AVCodecContext *avctx;
int frame_flags;
int stereo, stereo_in;
@@ -118,6 +118,22 @@ typedef struct WavpackContext {
int max_samples;
int pos;
SavedContext sc, extra_sc;
+} WavpackFrameContext;
+
+#define WV_MAX_FRAME_DECODERS 14
+
+typedef struct WavpackContext {
+ AVCodecContext *avctx;
+
+ WavpackFrameContext *fdec[WV_MAX_FRAME_DECODERS];
+ int fdec_num;
+
+ int multichannel;
+ int mkv_mode;
+ int block;
+ int samples;
+ int samples_left;
+ int ch_offset;
} WavpackContext;
// exponent table copied from WavPack source
@@ -224,7 +240,7 @@ static av_always_inline int get_tail(GetBitContext *gb, int k)
return res;
}
-static void update_error_limit(WavpackContext *ctx)
+static void update_error_limit(WavpackFrameContext *ctx)
{
int i, br[2], sl[2];
@@ -258,7 +274,7 @@ static void update_error_limit(WavpackContext *ctx)
}
}
-static int wv_get_value(WavpackContext *ctx, GetBitContext *gb, int channel, int *last)
+static int wv_get_value(WavpackFrameContext *ctx, GetBitContext *gb, int channel, int *last)
{
int t, t2;
int sign, base, add, ret;
@@ -361,7 +377,7 @@ static int wv_get_value(WavpackContext *ctx, GetBitContext *gb, int channel, int
return sign ? ~ret : ret;
}
-static inline int wv_get_value_integer(WavpackContext *s, uint32_t *crc, int S)
+static inline int wv_get_value_integer(WavpackFrameContext *s, uint32_t *crc, int S)
{
int bit;
@@ -377,7 +393,7 @@ static inline int wv_get_value_integer(WavpackContext *s, uint32_t *crc, int S)
return (((S + bit) << s->shift) - bit) << s->post_shift;
}
-static float wv_get_value_float(WavpackContext *s, uint32_t *crc, int S)
+static float wv_get_value_float(WavpackFrameContext *s, uint32_t *crc, int S)
{
union {
float f;
@@ -450,13 +466,13 @@ static float wv_get_value_float(WavpackContext *s, uint32_t *crc, int S)
return value.f;
}
-static void wv_reset_saved_context(WavpackContext *s)
+static void wv_reset_saved_context(WavpackFrameContext *s)
{
s->pos = 0;
s->sc.crc = s->extra_sc.crc = 0xFFFFFFFF;
}
-static inline int wv_unpack_stereo(WavpackContext *s, GetBitContext *gb, void *dst, const int type)
+static inline int wv_unpack_stereo(WavpackFrameContext *s, GetBitContext *gb, void *dst, const int type)
{
int i, j, count = 0;
int last, t;
@@ -467,6 +483,7 @@ static inline int wv_unpack_stereo(WavpackContext *s, GetBitContext *gb, void *d
int16_t *dst16 = dst;
int32_t *dst32 = dst;
float *dstfl = dst;
+ const int channel_pad = s->avctx->channels - 2;
if(s->samples_left == s->samples)
s->one = s->zero = s->zeroes = 0;
@@ -549,12 +566,15 @@ static inline int wv_unpack_stereo(WavpackContext *s, GetBitContext *gb, void *d
if(type == AV_SAMPLE_FMT_FLT){
*dstfl++ = wv_get_value_float(s, &crc_extra_bits, L);
*dstfl++ = wv_get_value_float(s, &crc_extra_bits, R);
+ dstfl += channel_pad;
} else if(type == AV_SAMPLE_FMT_S32){
*dst32++ = wv_get_value_integer(s, &crc_extra_bits, L);
*dst32++ = wv_get_value_integer(s, &crc_extra_bits, R);
+ dst32 += channel_pad;
} else {
*dst16++ = wv_get_value_integer(s, &crc_extra_bits, L);
*dst16++ = wv_get_value_integer(s, &crc_extra_bits, R);
+ dst16 += channel_pad;
}
count++;
}while(!last && count < s->max_samples);
@@ -582,7 +602,7 @@ static inline int wv_unpack_stereo(WavpackContext *s, GetBitContext *gb, void *d
return count * 2;
}
-static inline int wv_unpack_mono(WavpackContext *s, GetBitContext *gb, void *dst, const int type)
+static inline int wv_unpack_mono(WavpackFrameContext *s, GetBitContext *gb, void *dst, const int type)
{
int i, j, count = 0;
int last, t;
@@ -593,6 +613,7 @@ static inline int wv_unpack_mono(WavpackContext *s, GetBitContext *gb, void *dst
int16_t *dst16 = dst;
int32_t *dst32 = dst;
float *dstfl = dst;
+ const int channel_stride = s->avctx->channels;
if(s->samples_left == s->samples)
s->one = s->zero = s->zeroes = 0;
@@ -623,12 +644,16 @@ static inline int wv_unpack_mono(WavpackContext *s, GetBitContext *gb, void *dst
pos = (pos + 1) & 7;
crc = crc * 3 + S;
- if(type == AV_SAMPLE_FMT_FLT)
- *dstfl++ = wv_get_value_float(s, &crc_extra_bits, S);
- else if(type == AV_SAMPLE_FMT_S32)
- *dst32++ = wv_get_value_integer(s, &crc_extra_bits, S);
- else
- *dst16++ = wv_get_value_integer(s, &crc_extra_bits, S);
+ if(type == AV_SAMPLE_FMT_FLT){
+ *dstfl = wv_get_value_float(s, &crc_extra_bits, S);
+ dstfl += channel_stride;
+ }else if(type == AV_SAMPLE_FMT_S32){
+ *dst32 = wv_get_value_integer(s, &crc_extra_bits, S);
+ dst32 += channel_stride;
+ }else{
+ *dst16 = wv_get_value_integer(s, &crc_extra_bits, S);
+ dst16 += channel_stride;
+ }
count++;
}while(!last && count < s->max_samples);
@@ -655,47 +680,92 @@ static inline int wv_unpack_mono(WavpackContext *s, GetBitContext *gb, void *dst
return count;
}
+static av_cold int wv_alloc_frame_context(WavpackContext *c)
+{
+
+ if(c->fdec_num == WV_MAX_FRAME_DECODERS)
+ return -1;
+
+ c->fdec[c->fdec_num] = av_mallocz(sizeof(**c->fdec));
+ if(!c->fdec[c->fdec_num])
+ return -1;
+ c->fdec_num++;
+ c->fdec[c->fdec_num - 1]->avctx = c->avctx;
+ wv_reset_saved_context(c->fdec[c->fdec_num - 1]);
+
+ return 0;
+}
+
static av_cold int wavpack_decode_init(AVCodecContext *avctx)
{
WavpackContext *s = avctx->priv_data;
s->avctx = avctx;
- if (avctx->channels > 2) {
- av_log(avctx, AV_LOG_ERROR, "Multichannel WavPack is not supported yet.\n");
- return -1;
- }
- s->stereo = (avctx->channels == 2);
if(avctx->bits_per_coded_sample <= 16)
avctx->sample_fmt = AV_SAMPLE_FMT_S16;
else
avctx->sample_fmt = AV_SAMPLE_FMT_S32;
+ if(avctx->channels <= 2 && !avctx->channel_layout)
avctx->channel_layout = (avctx->channels==2) ? CH_LAYOUT_STEREO : CH_LAYOUT_MONO;
- wv_reset_saved_context(s);
+ s->multichannel = avctx->channels > 2;
+ /* lavf demuxer does not provide extradata, Matroska stores 0x403
+ there, use this to detect decoding mode for multichannel */
+ s->mkv_mode = 0;
+ if(s->multichannel && avctx->extradata && avctx->extradata_size == 2){
+ int ver = AV_RL16(avctx->extradata);
+ if(ver >= 0x402 && ver <= 0x410)
+ s->mkv_mode = 1;
+ }
+
+ s->fdec_num = 0;
return 0;
}
-static int wavpack_decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
- AVPacket *avpkt)
+static av_cold int wavpack_decode_end(AVCodecContext *avctx)
{
- const uint8_t *buf = avpkt->data;
- int buf_size = avpkt->size;
WavpackContext *s = avctx->priv_data;
+ int i;
+
+ for(i = 0; i < s->fdec_num; i++)
+ av_freep(&s->fdec[i]);
+ s->fdec_num = 0;
+
+ return 0;
+}
+
+static int wavpack_decode_block(AVCodecContext *avctx, int block_no,
+ void *data, int *data_size,
+ const uint8_t *buf, int buf_size)
+{
+ WavpackContext *wc = avctx->priv_data;
+ WavpackFrameContext *s;
void *samples = data;
int samplecount;
int got_terms = 0, got_weights = 0, got_samples = 0, got_entropy = 0, got_bs = 0, got_float = 0;
int got_hybrid = 0;
+ const uint8_t* orig_buf = buf;
const uint8_t* buf_end = buf + buf_size;
int i, j, id, size, ssize, weights, t;
- int bpp;
+ int bpp, chan, chmask;
if (buf_size == 0){
*data_size = 0;
return 0;
}
+ if(block_no >= wc->fdec_num && wv_alloc_frame_context(wc) < 0){
+ av_log(avctx, AV_LOG_ERROR, "Error creating frame decode context\n");
+ return -1;
+ }
+
+ s = wc->fdec[block_no];
+ if(!s){
+ av_log(avctx, AV_LOG_ERROR, "Context for block %d is not present\n", block_no);
+ return -1;
+ }
+
if(!s->samples_left){
memset(s->decorr, 0, MAX_TERMS * sizeof(Decorr));
memset(s->ch, 0, sizeof(s->ch));
@@ -704,11 +774,15 @@ static int wavpack_decode_frame(AVCodecContext *avctx,
s->got_extra_bits = 0;
}
+ if(!wc->mkv_mode){
s->samples = AV_RL32(buf); buf += 4;
if(!s->samples){
*data_size = 0;
return buf_size;
}
+ }else{
+ s->samples = wc->samples;
+ }
s->frame_flags = AV_RL32(buf); buf += 4;
if(s->frame_flags&0x80){
bpp = sizeof(float);
@@ -720,12 +794,19 @@ static int wavpack_decode_frame(AVCodecContext *avctx,
bpp = 4;
avctx->sample_fmt = AV_SAMPLE_FMT_S32;
}
+ samples = (uint8_t*)samples + bpp * wc->ch_offset;
+
+ s->stereo = !(s->frame_flags & WV_MONO);
s->stereo_in = (s->frame_flags & WV_FALSE_STEREO) ? 0 : s->stereo;
s->joint = s->frame_flags & WV_JOINT_STEREO;
s->hybrid = s->frame_flags & WV_HYBRID_MODE;
s->hybrid_bitrate = s->frame_flags & WV_HYBRID_BITRATE;
s->post_shift = 8 * (bpp-1-(s->frame_flags&0x03)) + ((s->frame_flags >> 13) & 0x1f);
s->CRC = AV_RL32(buf); buf += 4;
+ if(wc->mkv_mode)
+ buf += 4; //skip block size;
+
+ wc->ch_offset += 1 + s->stereo;
s->max_samples = *data_size / (bpp * avctx->channels);
s->max_samples = FFMIN(s->max_samples, s->samples);
@@ -899,7 +980,7 @@ static int wavpack_decode_frame(AVCodecContext *avctx,
got_float = 1;
break;
case WP_ID_DATA:
- s->sc.offset = buf - avpkt->data;
+ s->sc.offset = buf - orig_buf;
s->sc.size = size * 8;
init_get_bits(&s->gb, buf, size * 8);
s->data_size = size * 8;
@@ -912,13 +993,50 @@ static int wavpack_decode_frame(AVCodecContext *avctx,
buf += size;
continue;
}
- s->extra_sc.offset = buf - avpkt->data;
+ s->extra_sc.offset = buf - orig_buf;
s->extra_sc.size = size * 8;
init_get_bits(&s->gb_extra_bits, buf, size * 8);
s->crc_extra_bits = get_bits_long(&s->gb_extra_bits, 32);
buf += size;
s->got_extra_bits = 1;
break;
+ case WP_ID_CHANINFO:
+ if(size <= 1){
+ av_log(avctx, AV_LOG_ERROR, "Insufficient channel information\n");
+ return -1;
+ }
+ chan = *buf++;
+ switch(size - 2){
+ case 0:
+ chmask = *buf;
+ break;
+ case 1:
+ chmask = AV_RL16(buf);
+ break;
+ case 2:
+ chmask = AV_RL24(buf);
+ break;
+ case 3:
+ chmask = AV_RL32(buf);
+ break;
+ case 5:
+ chan |= (buf[1] & 0xF) << 8;
+ chmask = AV_RL24(buf + 2);
+ break;
+ default:
+ av_log(avctx, AV_LOG_ERROR, "Invalid channel info size %d\n", size);
+ chan = avctx->channels;
+ chmask = avctx->channel_layout;
+ }
+ if(chan != avctx->channels){
+ av_log(avctx, AV_LOG_ERROR, "Block reports total %d channels, decoder believes it's %d channels\n",
+ chan, avctx->channels);
+ return -1;
+ }
+ if(!avctx->channel_layout)
+ avctx->channel_layout = chmask;
+ buf += size - 1;
+ break;
default:
buf += size;
}
@@ -963,10 +1081,10 @@ static int wavpack_decode_frame(AVCodecContext *avctx,
}
s->samples_left = s->samples;
}else{
- init_get_bits(&s->gb, avpkt->data + s->sc.offset, s->sc.size);
+ init_get_bits(&s->gb, orig_buf + s->sc.offset, s->sc.size);
skip_bits_long(&s->gb, s->sc.bits_used);
if(s->got_extra_bits){
- init_get_bits(&s->gb_extra_bits, avpkt->data + s->extra_sc.offset,
+ init_get_bits(&s->gb_extra_bits, orig_buf + s->extra_sc.offset,
s->extra_sc.size);
skip_bits_long(&s->gb_extra_bits, s->extra_sc.bits_used);
}
@@ -979,8 +1097,10 @@ static int wavpack_decode_frame(AVCodecContext *avctx,
samplecount = wv_unpack_stereo(s, &s->gb, samples, AV_SAMPLE_FMT_S32);
else
samplecount = wv_unpack_stereo(s, &s->gb, samples, AV_SAMPLE_FMT_FLT);
-
+ samplecount >>= 1;
}else{
+ const int channel_stride = avctx->channels;
+
if(avctx->sample_fmt == AV_SAMPLE_FMT_S16)
samplecount = wv_unpack_mono(s, &s->gb, samples, AV_SAMPLE_FMT_S16);
else if(avctx->sample_fmt == AV_SAMPLE_FMT_S32)
@@ -989,37 +1109,83 @@ static int wavpack_decode_frame(AVCodecContext *avctx,
samplecount = wv_unpack_mono(s, &s->gb, samples, AV_SAMPLE_FMT_FLT);
if(s->stereo && avctx->sample_fmt == AV_SAMPLE_FMT_S16){
- int16_t *dst = (int16_t*)samples + samplecount * 2;
- int16_t *src = (int16_t*)samples + samplecount;
+ int16_t *dst = (int16_t*)samples + 1;
+ int16_t *src = (int16_t*)samples;
int cnt = samplecount;
while(cnt--){
- *--dst = *--src;
- *--dst = *src;
+ *dst = *src;
+ src += channel_stride;
+ dst += channel_stride;
}
- samplecount *= 2;
}else if(s->stereo && avctx->sample_fmt == AV_SAMPLE_FMT_S32){
- int32_t *dst = (int32_t*)samples + samplecount * 2;
- int32_t *src = (int32_t*)samples + samplecount;
+ int32_t *dst = (int32_t*)samples + 1;
+ int32_t *src = (int32_t*)samples;
int cnt = samplecount;
while(cnt--){
- *--dst = *--src;
- *--dst = *src;
+ *dst = *src;
+ src += channel_stride;
+ dst += channel_stride;
}
- samplecount *= 2;
}else if(s->stereo){
- float *dst = (float*)samples + samplecount * 2;
- float *src = (float*)samples + samplecount;
+ float *dst = (float*)samples + 1;
+ float *src = (float*)samples;
int cnt = samplecount;
while(cnt--){
- *--dst = *--src;
- *--dst = *src;
+ *dst = *src;
+ src += channel_stride;
+ dst += channel_stride;
+ }
+ }
+ }
+
+ wc->samples_left = s->samples_left;
+
+ return samplecount * bpp;
+}
+
+static int wavpack_decode_frame(AVCodecContext *avctx,
+ void *data, int *data_size,
+ AVPacket *avpkt)
+{
+ WavpackContext *s = avctx->priv_data;
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+ int frame_size;
+ int samplecount = 0;
+
+ s->block = 0;
+ s->samples_left = 0;
+ s->ch_offset = 0;
+
+ if(s->mkv_mode){
+ s->samples = AV_RL32(buf); buf += 4;
+ }
+ while(buf_size > 0){
+ if(!s->multichannel){
+ frame_size = buf_size;
+ }else{
+ if(!s->mkv_mode){
+ frame_size = AV_RL32(buf) - 12; buf += 4; buf_size -= 4;
+ }else{
+ if(buf_size < 12) //MKV files can have zero flags after last block
+ break;
+ frame_size = AV_RL32(buf + 8) + 12;
}
- samplecount *= 2;
}
+ if(frame_size < 0 || frame_size > buf_size){
+ av_log(avctx, AV_LOG_ERROR, "Block %d has invalid size (size %d vs. %d bytes left)\n",
+ s->block, frame_size, buf_size);
+ return -1;
+ }
+ if((samplecount = wavpack_decode_block(avctx, s->block, data,
+ data_size, buf, frame_size)) < 0)
+ return -1;
+ s->block++;
+ buf += frame_size; buf_size -= frame_size;
}
- *data_size = samplecount * bpp;
+ *data_size = samplecount * avctx->channels;
- return s->samples_left > 0 ? 0 : buf_size;
+ return s->samples_left > 0 ? 0 : avpkt->size;
}
AVCodec wavpack_decoder = {
@@ -1029,7 +1195,7 @@ AVCodec wavpack_decoder = {
sizeof(WavpackContext),
wavpack_decode_init,
NULL,
- NULL,
+ wavpack_decode_end,
wavpack_decode_frame,
.capabilities = CODEC_CAP_SUBFRAMES,
.long_name = NULL_IF_CONFIG_SMALL("WavPack"),
diff --git a/libavformat/wv.c b/libavformat/wv.c
index 5692230..d04e00a 100644
--- a/libavformat/wv.c
+++ b/libavformat/wv.c
@@ -1,6 +1,6 @@
/*
* WavPack demuxer
- * Copyright (c) 2006 Konstantin Shishkov
+ * Copyright (c) 2006,2011 Konstantin Shishkov
*
* This file is part of FFmpeg.
*
@@ -29,6 +29,10 @@
#define WV_EXTRA_SIZE 12
+#define WV_START_BLOCK 0x0800
+#define WV_END_BLOCK 0x1000
+#define WV_SINGLE_BLOCK (WV_START_BLOCK | WV_END_BLOCK)
+
enum WV_FLAGS{
WV_MONO = 0x0004,
WV_HYBRID = 0x0008,
@@ -51,7 +55,9 @@ static const int wv_rates[16] = {
typedef struct{
uint32_t blksize, flags;
int rate, chan, bpp;
+ uint32_t chmask;
uint32_t samples, soff;
+ int multichannel;
int block_parsed;
uint8_t extra[WV_EXTRA_SIZE];
int64_t pos;
@@ -69,14 +75,16 @@ static int wv_probe(AVProbeData *p)
return 0;
}
-static int wv_read_block_header(AVFormatContext *ctx, ByteIOContext *pb)
+static int wv_read_block_header(AVFormatContext *ctx, ByteIOContext *pb, int append)
{
WVContext *wc = ctx->priv_data;
uint32_t tag, ver;
int size;
int rate, bpp, chan;
+ uint32_t chmask;
wc->pos = url_ftell(pb);
+ if(!append){
tag = get_le32(pb);
if (tag != MKTAG('w', 'v', 'p', 'k'))
return -1;
@@ -96,19 +104,24 @@ static int wv_read_block_header(AVFormatContext *ctx, ByteIOContext *pb)
wc->samples = get_le32(pb); // total samples in file
wc->soff = get_le32(pb); // offset in samples of current block
get_buffer(pb, wc->extra, WV_EXTRA_SIZE);
+ }else{
+ size = wc->blksize;
+ }
wc->flags = AV_RL32(wc->extra + 4);
//parse flags
bpp = ((wc->flags & 3) + 1) << 3;
chan = 1 + !(wc->flags & WV_MONO);
+ chmask = wc->flags & WV_MONO ? CH_LAYOUT_MONO : CH_LAYOUT_STEREO;
rate = wv_rates[(wc->flags >> 23) & 0xF];
- if((wc->flags & 0x1800) != 0x1800){
- av_log(ctx, AV_LOG_ERROR, "Multichannel WavPack is not supported yet.\n");
- return -1;
+ wc->multichannel = !!((wc->flags & WV_SINGLE_BLOCK) != WV_SINGLE_BLOCK);
+ if(wc->multichannel){
+ chan = wc->chan;
+ chmask = wc->chmask;
}
- if(rate == -1 && !wc->block_parsed){
+ if((rate == -1 || !chan) && !wc->block_parsed){
int64_t block_end = url_ftell(pb) + wc->blksize - 24;
if(url_is_streamed(pb)){
- av_log(ctx, AV_LOG_ERROR, "Cannot determine custom sampling rate\n");
+ av_log(ctx, AV_LOG_ERROR, "Cannot determine additional parameters\n");
return -1;
}
while(url_ftell(pb) < block_end){
@@ -118,12 +131,44 @@ static int wv_read_block_header(AVFormatContext *ctx, ByteIOContext *pb)
size <<= 1;
if(id&0x40)
size--;
- if((id&0x3F) == 0x27){
+ switch(id&0x3F){
+ case 0xD:
+ if(size <= 1){
+ av_log(ctx, AV_LOG_ERROR, "Insufficient channel information\n");
+ return -1;
+ }
+ chan = get_byte(pb);
+ switch(size - 2){
+ case 0:
+ chmask = get_byte(pb);
+ break;
+ case 1:
+ chmask = get_le16(pb);
+ break;
+ case 2:
+ chmask = get_le24(pb);
+ break;
+ case 3:
+ chmask = get_le32(pb);
+ break;
+ case 5:
+ url_fskip(pb, 1);
+ chan |= (get_byte(pb) & 0xF) << 8;
+ chmask = get_le24(pb);
+ break;
+ default:
+ av_log(ctx, AV_LOG_ERROR, "Invalid channel info size %d\n", size);
+ return -1;
+ }
+ break;
+ case 0x27:
rate = get_le24(pb);
break;
- }else{
+ default:
url_fskip(pb, size);
}
+ if(id&0x40)
+ url_fskip(pb, 1);
}
if(rate == -1){
av_log(ctx, AV_LOG_ERROR, "Cannot determine custom sampling rate\n");
@@ -133,13 +178,14 @@ static int wv_read_block_header(AVFormatContext *ctx, ByteIOContext *pb)
}
if(!wc->bpp) wc->bpp = bpp;
if(!wc->chan) wc->chan = chan;
+ if(!wc->chmask) wc->chmask = chmask;
if(!wc->rate) wc->rate = rate;
if(wc->flags && bpp != wc->bpp){
av_log(ctx, AV_LOG_ERROR, "Bits per sample differ, this block: %i, header block: %i\n", bpp, wc->bpp);
return -1;
}
- if(wc->flags && chan != wc->chan){
+ if(wc->flags && !wc->multichannel && chan != wc->chan){
av_log(ctx, AV_LOG_ERROR, "Channels differ, this block: %i, header block: %i\n", chan, wc->chan);
return -1;
}
@@ -159,7 +205,7 @@ static int wv_read_header(AVFormatContext *s,
AVStream *st;
wc->block_parsed = 0;
- if(wv_read_block_header(s, pb) < 0)
+ if(wv_read_block_header(s, pb, 0) < 0)
return -1;
/* now we are ready: build format streams */
@@ -169,6 +215,7 @@ static int wv_read_header(AVFormatContext *s,
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->codec_id = CODEC_ID_WAVPACK;
st->codec->channels = wc->chan;
+ st->codec->channel_layout = wc->chmask;
st->codec->sample_rate = wc->rate;
st->codec->bits_per_coded_sample = wc->bpp;
av_set_pts_info(st, 64, 1, wc->rate);
@@ -191,25 +238,70 @@ static int wv_read_packet(AVFormatContext *s,
{
WVContext *wc = s->priv_data;
int ret;
+ int size, ver, off;
if (url_feof(s->pb))
return AVERROR(EIO);
if(wc->block_parsed){
- if(wv_read_block_header(s, s->pb) < 0)
+ if(wv_read_block_header(s, s->pb, 0) < 0)
return -1;
}
- if(av_new_packet(pkt, wc->blksize + WV_EXTRA_SIZE) < 0)
+ off = wc->multichannel ? 4 : 0;
+ if(av_new_packet(pkt, wc->blksize + WV_EXTRA_SIZE + off) < 0)
return AVERROR(ENOMEM);
- memcpy(pkt->data, wc->extra, WV_EXTRA_SIZE);
- ret = get_buffer(s->pb, pkt->data + WV_EXTRA_SIZE, wc->blksize);
+ if(wc->multichannel)
+ AV_WL32(pkt->data, wc->blksize + WV_EXTRA_SIZE + 12);
+ memcpy(pkt->data + off, wc->extra, WV_EXTRA_SIZE);
+ ret = get_buffer(s->pb, pkt->data + WV_EXTRA_SIZE + off, wc->blksize);
if(ret != wc->blksize){
av_free_packet(pkt);
return AVERROR(EIO);
}
+ while(!(wc->flags & WV_END_BLOCK)){
+ if(get_le32(s->pb) != MKTAG('w', 'v', 'p', 'k')){
+ av_free_packet(pkt);
+ return -1;
+ }
+ if((ret = av_append_packet(s->pb, pkt, 4)) < 0){
+ av_free_packet(pkt);
+ return ret;
+ }
+ size = AV_RL32(pkt->data + pkt->size - 4);
+ if(size < 24 || size > WV_BLOCK_LIMIT){
+ av_free_packet(pkt);
+ av_log(s, AV_LOG_ERROR, "Incorrect block size %d\n", size);
+ return -1;
+ }
+ wc->blksize = size;
+ ver = get_le16(s->pb);
+ if(ver < 0x402 || ver > 0x410){
+ av_free_packet(pkt);
+ av_log(s, AV_LOG_ERROR, "Unsupported version %03X\n", ver);
+ return -1;
+ }
+ get_byte(s->pb); // track no
+ get_byte(s->pb); // track sub index
+ wc->samples = get_le32(s->pb); // total samples in file
+ wc->soff = get_le32(s->pb); // offset in samples of current block
+ if((ret = av_append_packet(s->pb, pkt, WV_EXTRA_SIZE)) < 0){
+ av_free_packet(pkt);
+ return ret;
+ }
+ memcpy(wc->extra, pkt->data + pkt->size - WV_EXTRA_SIZE, WV_EXTRA_SIZE);
+
+ if(wv_read_block_header(s, s->pb, 1) < 0){
+ av_free_packet(pkt);
+ return -1;
+ }
+ ret = av_append_packet(s->pb, pkt, wc->blksize);
+ if(ret < 0){
+ av_free_packet(pkt);
+ return ret;
+ }
+ }
pkt->stream_index = 0;
wc->block_parsed = 1;
- pkt->size = ret + WV_EXTRA_SIZE;
pkt->pts = wc->soff;
av_add_index_entry(s->streams[0], wc->pos, pkt->pts, 0, 0, AVINDEX_KEYFRAME);
return 0;
--
1.7.0.4
More information about the ffmpeg-devel
mailing list