/*
* WavPack lossless audio decoder
- * Copyright (c) 2006 Konstantin Shishkov
+ * Copyright (c) 2006,2011 Konstantin Shishkov
*
* This file is part of FFmpeg.
*
int bitrate_acc, bitrate_delta;
} WvChannel;
-typedef struct WavpackContext {
+typedef struct WavpackFrameContext {
AVCodecContext *avctx;
int frame_flags;
int stereo, stereo_in;
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
return res;
}
-static void update_error_limit(WavpackContext *ctx)
+static void update_error_limit(WavpackFrameContext *ctx)
{
int i, br[2], sl[2];
}
}
-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;
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;
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;
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;
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;
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);
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;
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;
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->samples);
+ }while(!last && count < s->max_samples);
s->samples_left -= count;
if(!s->samples_left){
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));
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);
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);
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;
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;
}
}
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);
}
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)
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 = {
sizeof(WavpackContext),
wavpack_decode_init,
NULL,
- NULL,
+ wavpack_decode_end,
wavpack_decode_frame,
.capabilities = CODEC_CAP_SUBFRAMES,
.long_name = NULL_IF_CONFIG_SMALL("WavPack"),
projects / ffmpeg / blobdiff