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* DV demuxer is now capable of decoding auxilary audio stream. So,

Browse Source 
everybody who still uses second streo track for dubbing can
     now export it.

   * void* -> DVDemuxContext* change (per Fabrice's suggestion).

   * -dv1394 capture now works in all modes.

Originally committed as revision 2458 to svn://svn.ffmpeg.org/ffmpeg/trunk
pull/126/head
Roman Shaposhnik 21 years ago
parent 99614dd4e9
commit ddaae6a9d1
6 changed files with 127 additions and 76 deletions
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  1. 6
      ffmpeg.c
  2. 4
      libavcodec/dvdata.h
  3. 13
      libavformat/avidec.c
  4. 160
      libavformat/dv.c
  5. 16
      libavformat/dv.h
  6. 4
      libavformat/dv1394.c

6
ffmpeg.c
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@ -2542,6 +2542,12 @@ static void prepare_grab(void)
fprintf(stderr, "Could not find video grab device\n");
exit(1);
}
/* If not enough info to get the stream parameters, we decode the
first frames to get it. */
if ((ic->ctx_flags & AVFMTCTX_NOHEADER) && av_find_stream_info(ic) < 0) {
fprintf(stderr, "Could not find video grab parameters\n");
exit(1);
}
/* by now video grab has one stream */
ic->streams[0]->r_frame_rate = vp->frame_rate;
ic->streams[0]->r_frame_rate_base = vp->frame_rate_base;

4
libavcodec/dvdata.h
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@ -37,6 +37,7 @@ typedef struct DVprofile {
int ltc_divisor; /* FPS from the LTS standpoint */
int height; /* picture height in pixels */
int width; /* picture width in pixels */
AVRational sar[2]; /* sample aspect ratios for 4:3 and 16:9 */
const uint16_t *video_place; /* positions of all DV macro blocks */
enum PixelFormat pix_fmt; /* picture pixel format */
@ -1293,6 +1294,7 @@ static const DVprofile dv_profiles[] = {
.frame_rate_base = 1001,
.height = 480,
.width = 720,
.sar = {{72, 79}, {96, 79}},
.video_place = dv_place_411,
.pix_fmt = PIX_FMT_YUV411P,
.audio_stride = 90,
@ -1308,6 +1310,7 @@ static const DVprofile dv_profiles[] = {
.ltc_divisor = 25,
.height = 576,
.width = 720,
.sar = {{128, 117}, {512, 351}},
.video_place = dv_place_420,
.pix_fmt = PIX_FMT_YUV420P,
.audio_stride = 108,
@ -1323,6 +1326,7 @@ static const DVprofile dv_profiles[] = {
.ltc_divisor = 25,
.height = 576,
.width = 720,
.sar = {{128, 117}, {512, 351}},
.video_place = dv_place_411P,
.pix_fmt = PIX_FMT_YUV411P,
.audio_stride = 108,

13
libavformat/avidec.c
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@ -33,7 +33,7 @@ typedef struct {
int64_t movi_end;
offset_t movi_list;
AVIIndex *first, *last;
void* dv_demux;
DVDemuxContext* dv_demux;
} AVIContext;
#ifdef DEBUG
@ -140,11 +140,16 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
handler != MKTAG('d', 'v', 'h', 'd') &&
handler != MKTAG('d', 'v', 's', 'l'))
goto fail;
avi->dv_demux = dv_init_demux(s, stream_index, stream_index + 1);
av_freep(&s->streams[0]->codec.extradata);
av_freep(&s->streams[0]);
s->nb_streams = 0;
avi->dv_demux = dv_init_demux(s);
if (!avi->dv_demux)
goto fail;
stream_index++;
stream_index = s->nb_streams - 1;
url_fskip(pb, size - 8);
break;
case MKTAG('v', 'i', 'd', 's'):
codec_type = CODEC_TYPE_VIDEO;

160
libavformat/dv.c
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@ -25,14 +25,17 @@
#include <time.h>
#include "avformat.h"
#include "dvdata.h"
#include "dv.h"
struct DVDemuxContext {
AVFormatContext* fctx;
AVStream* vst;
AVStream* ast[2];
AVPacket audio_pkt[2];
int ach;
};
typedef struct DVDemuxContext {
AVPacket audio_pkt;
AVStream *vst;
AVStream *ast;
} DVDemuxContext;
typedef struct DVMuxContext {
struct DVMuxContext {
const DVprofile* sys; /* Current DV profile. E.g.: 525/60, 625/50 */
uint8_t frame_buf[144000]; /* frame under contruction */
FifoBuffer audio_data; /* Fifo for storing excessive amounts of PCM */
@ -41,7 +44,7 @@ typedef struct DVMuxContext {
uint8_t aspect; /* Aspect ID 0 - 4:3, 7 - 16:9 */
int has_audio; /* frame under contruction has audio */
int has_video; /* frame under contruction has video */
} DVMuxContext;
};
enum dv_section_type {
dv_sect_header = 0x1f,
@ -451,9 +454,9 @@ static const uint8_t* dv_extract_pack(uint8_t* frame, enum dv_pack_type t)
* 3. Audio is always returned as 16bit linear samples: 12bit nonlinear samples
* are converted into 16bit linear ones.
*/
static int dv_extract_audio(uint8_t* frame, uint8_t* pcm)
static int dv_extract_audio(uint8_t* frame, uint8_t* pcm, uint8_t* pcm2)
{
int size, i, j, d, of, smpls, freq, quant;
int size, i, j, d, of, smpls, freq, quant, half_ch;
uint16_t lc, rc;
const DVprofile* sys;
const uint8_t* as_pack;
@ -471,10 +474,18 @@ static int dv_extract_audio(uint8_t* frame, uint8_t* pcm)
return -1; /* Unsupported quantization */
size = (sys->audio_min_samples[freq] + smpls) * 4; /* 2ch, 2bytes */
half_ch = sys->difseg_size/2;
/* for each DIF segment */
for (i = 0; i < sys->difseg_size; i++) {
frame += 6 * 80; /* skip DIF segment header */
if (quant == 1 && i == half_ch) {
if (!pcm2)
break;
else
pcm = pcm2;
}
for (j = 0; j < 9; j++) {
for (d = 8; d < 80; d += 2) {
if (quant == 0) { /* 16bit quantization */
@ -487,9 +498,6 @@ static int dv_extract_audio(uint8_t* frame, uint8_t* pcm)
if (pcm[of*2+1] == 0x80 && pcm[of*2] == 0x00)
pcm[of*2+1] = 0;
} else { /* 12bit quantization */
if (i >= sys->difseg_size/2)
goto out; /* We're not doing 4ch at this time */
lc = ((uint16_t)frame[d] << 4) |
((uint16_t)frame[d+2] >> 4);
rc = ((uint16_t)frame[d+1] << 4) |
@ -497,13 +505,13 @@ static int dv_extract_audio(uint8_t* frame, uint8_t* pcm)
lc = (lc == 0x800 ? 0 : dv_audio_12to16(lc));
rc = (rc == 0x800 ? 0 : dv_audio_12to16(rc));
of = sys->audio_shuffle[i][j] + (d - 8)/3 * sys->audio_stride;
of = sys->audio_shuffle[i%half_ch][j] + (d - 8)/3 * sys->audio_stride;
if (of*2 >= size)
continue;
pcm[of*2] = lc & 0xff; // FIXME: may be we have to admit
pcm[of*2+1] = lc >> 8; // that DV is a big endian PCM
of = sys->audio_shuffle[i+sys->difseg_size/2][j] +
of = sys->audio_shuffle[i%half_ch+half_ch][j] +
(d - 8)/3 * sys->audio_stride;
pcm[of*2] = rc & 0xff; // FIXME: may be we have to admit
pcm[of*2+1] = rc >> 8; // that DV is a big endian PCM
@ -515,53 +523,68 @@ static int dv_extract_audio(uint8_t* frame, uint8_t* pcm)
}
}
out:
return size;
}
static int dv_extract_audio_info(uint8_t* frame, AVCodecContext* avctx)
static int dv_extract_audio_info(DVDemuxContext* c, uint8_t* frame)
{
const uint8_t* as_pack;
const DVprofile* sys;
int freq, smpls;
int freq, smpls, quant, i;
sys = dv_frame_profile(frame);
as_pack = dv_extract_pack(frame, dv_audio_source);
if (!as_pack || !sys) /* No audio ? */
if (!as_pack || !sys) { /* No audio ? */
c->ach = 0;
return -1;
}
smpls = as_pack[1] & 0x3f; /* samples in this frame - min. samples */
freq = (as_pack[4] >> 3) & 0x07; /* 0 - 48KHz, 1 - 44,1kHz, 2 - 32 kHz */
avctx->sample_rate = dv_audio_frequency[freq];
avctx->channels = 2;
avctx->bit_rate = avctx->channels * avctx->sample_rate * 16;
quant = as_pack[4] & 0x07; /* 0 - 16bit linear, 1 - 12bit nonlinear */
c->ach = (quant && freq == 2) ? 2 : 1;
/* The second stereo channel could appear in IEC 61834 stream only */
if (c->ach == 2 && !c->ast[1]) {
c->ast[1] = av_new_stream(c->fctx, 0);
if (c->ast[1]) {
c->ast[1]->codec.codec_type = CODEC_TYPE_AUDIO;
c->ast[1]->codec.codec_id = CODEC_ID_PCM_S16LE;
} else
c->ach = 1;
}
for (i=0; i<c->ach; i++) {
c->ast[i]->codec.sample_rate = dv_audio_frequency[freq];
c->ast[i]->codec.channels = 2;
c->ast[i]->codec.bit_rate = 2 * dv_audio_frequency[freq] * 16;
}
return (sys->audio_min_samples[freq] + smpls) * 4; /* 2ch, 2bytes */;
}
static int dv_extract_video_info(uint8_t* frame, AVCodecContext* avctx)
static int dv_extract_video_info(DVDemuxContext *c, uint8_t* frame)
{
const DVprofile* sys;
const uint8_t* vsc_pack;
int apt;
AVCodecContext* avctx;
int apt, is16_9;
int size = 0;
sys = dv_frame_profile(frame);
if (sys) {
apt = frame[4] & 0x07;
avctx->frame_rate = sys->frame_rate;
avctx = &c->vst->codec;
avctx->frame_rate = sys->frame_rate;
avctx->frame_rate_base = sys->frame_rate_base;
avctx->width = sys->width;
avctx->height = sys->height;
avctx->pix_fmt = sys->pix_fmt;
vsc_pack = dv_extract_pack(frame, dv_video_control);
/* MN: someone please fill in the correct SAR for dv, i dont have the standard doc so i cant, allthough its very likely the same as MPEG4 (12:11 10:11 16:11 40:33) */
if (vsc_pack && (vsc_pack[2] & 0x07) == (apt?0x02:0x07))
avctx->sample_aspect_ratio = (AVRational){16,9};
else
avctx->sample_aspect_ratio = (AVRational){4,3};
avctx->sample_aspect_ratio = av_div_q(avctx->sample_aspect_ratio, (AVRational){sys->width,sys->height});
vsc_pack = dv_extract_pack(frame, dv_video_control);
apt = frame[4] & 0x07;
is16_9 = (vsc_pack && (vsc_pack[2] & 0x07) == (apt?0x02:0x07));
avctx->sample_aspect_ratio = sys->sar[is16_9];
size = sys->frame_size;
}
return size;
@ -682,7 +705,7 @@ void dv_delete_mux(DVMuxContext *c)
fifo_free(&c->audio_data);
}
DVDemuxContext* dv_init_demux(AVFormatContext *s, int vid, int aid)
DVDemuxContext* dv_init_demux(AVFormatContext *s)
{
DVDemuxContext *c;
@ -690,27 +713,32 @@ DVDemuxContext* dv_init_demux(AVFormatContext *s, int vid, int aid)
if (!c)
return NULL;
c->vst = (vid < s->nb_streams) ? s->streams[vid] : av_new_stream(s, vid);
c->ast = (aid < s->nb_streams) ? s->streams[aid] : av_new_stream(s, aid);
if (!c->vst || !c->ast)
c->vst = av_new_stream(s, 0);
c->ast[0] = av_new_stream(s, 0);
if (!c->vst || !c->ast[0])
goto fail;
c->fctx = s;
c->ast[1] = NULL;
c->ach = 0;
c->audio_pkt[0].size = 0;
c->audio_pkt[1].size = 0;
c->vst->codec.codec_type = CODEC_TYPE_VIDEO;
c->vst->codec.codec_id = CODEC_ID_DVVIDEO;
c->vst->codec.bit_rate = 25000000;
c->ast->codec.codec_type = CODEC_TYPE_AUDIO;
c->ast->codec.codec_id = CODEC_ID_PCM_S16LE;
c->audio_pkt.size = 0;
c->ast[0]->codec.codec_type = CODEC_TYPE_AUDIO;
c->ast[0]->codec.codec_id = CODEC_ID_PCM_S16LE;
s->ctx_flags |= AVFMTCTX_NOHEADER;
return c;
fail:
if (c->vst)
av_free(c->vst);
if (c->ast)
av_free(c->ast);
if (c->ast[0])
av_free(c->ast[0]);
av_free(c);
return NULL;
}
@ -724,11 +752,15 @@ static void __destruct_pkt(struct AVPacket *pkt)
int dv_get_packet(DVDemuxContext *c, AVPacket *pkt)
{
int size = -1;
if (c->audio_pkt.size) {
*pkt = c->audio_pkt;
c->audio_pkt.size = 0;
size = pkt->size;
int i;
for (i=0; i<c->ach; i++) {
if (c->ast[i] && c->audio_pkt[i].size) {
*pkt = c->audio_pkt[i];
c->audio_pkt[i].size = 0;
size = pkt->size;
break;
}
}
return size;
@ -737,29 +769,31 @@ int dv_get_packet(DVDemuxContext *c, AVPacket *pkt)
int dv_produce_packet(DVDemuxContext *c, AVPacket *pkt,
uint8_t* buf, int buf_size)
{
int size;
int size, i;
if (buf_size < 4 || buf_size < dv_frame_profile(buf)->frame_size)
return -1; /* Broken frame, or not enough data */
/* Queueing audio packet */
/* FIXME: in case of no audio/bad audio we have to do something */
size = dv_extract_audio_info(buf, &c->ast->codec);
if (av_new_packet(&c->audio_pkt, size) < 0)
return AVERROR_NOMEM;
dv_extract_audio(buf, c->audio_pkt.data);
c->audio_pkt.size = size;
c->audio_pkt.stream_index = c->ast->id;
size = dv_extract_audio_info(c, buf);
c->audio_pkt[0].data = c->audio_pkt[1].data = NULL;
for (i=0; i<c->ach; i++) {
if (av_new_packet(&c->audio_pkt[i], size) < 0)
return AVERROR_NOMEM;
c->audio_pkt[i].stream_index = c->ast[i]->index;
}
dv_extract_audio(buf, c->audio_pkt[0].data, c->audio_pkt[1].data);
/* Now it's time to return video packet */
size = dv_extract_video_info(buf, &c->vst->codec);
size = dv_extract_video_info(c, buf);
av_init_packet(pkt);
pkt->destruct = __destruct_pkt;
pkt->data = buf;
pkt->size = size;
pkt->flags |= PKT_FLAG_KEY;
pkt->stream_index = c->vst->id;
return size;
}
@ -768,15 +802,15 @@ int dv_produce_packet(DVDemuxContext *c, AVPacket *pkt,
************************************************************/
typedef struct RawDVContext {
void* dv_demux;
uint8_t buf[144000];
uint8_t buf[144000];
DVDemuxContext* dv_demux;
} RawDVContext;
static int dv_read_header(AVFormatContext *s,
AVFormatParameters *ap)
{
RawDVContext *c = s->priv_data;
c->dv_demux = dv_init_demux(s, 0, 1);
c->dv_demux = dv_init_demux(s);
return c->dv_demux ? 0 : -1;
}

16
libavformat/dv.h
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@ -22,11 +22,13 @@
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
void* dv_init_demux(AVFormatContext *s, int vid, int aid);
int dv_get_packet(void*, AVPacket *);
int dv_produce_packet(void*, AVPacket*, uint8_t*, int);
void* dv_init_mux(AVFormatContext* s);
int dv_assemble_frame(void *c, AVStream*, const uint8_t*, int, uint8_t**);
void dv_delete_mux(void*);
typedef struct DVDemuxContext DVDemuxContext;
DVDemuxContext* dv_init_demux(AVFormatContext* s);
int dv_get_packet(DVDemuxContext*, AVPacket *);
int dv_produce_packet(DVDemuxContext*, AVPacket*, uint8_t*, int);
typedef struct DVMuxContext DVMuxContext;
DVMuxContext* dv_init_mux(AVFormatContext* s);
int dv_assemble_frame(DVMuxContext *c, AVStream*, const uint8_t*, int, uint8_t**);
void dv_delete_mux(DVMuxContext*);

4
libavformat/dv1394.c
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@ -45,7 +45,7 @@ struct dv1394_data {
int64_t pts; /* Current timestamp */
void* dv_demux; /* Generic DV muxing/demuxing context */
DVDemuxContext* dv_demux; /* Generic DV muxing/demuxing context */
};
/*
@ -85,7 +85,7 @@ static int dv1394_read_header(AVFormatContext * context, AVFormatParameters * ap
struct dv1394_data *dv = context->priv_data;
const char *video_device;
dv->dv_demux = dv_init_demux(context, 0, 1);
dv->dv_demux = dv_init_demux(context);
if (!dv->dv_demux)
goto failed;

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