/*
- * General DV muxer/demuxer
+ * General DV demuxer
* Copyright (c) 2003 Roman Shaposhnik
*
* Many thanks to Dan Dennedy <dan@dennedy.org> for providing wealth
*/
#include <time.h>
#include "avformat.h"
-#include "libavcodec/dvdata.h"
+#include "internal.h"
+#include "libavcodec/dv_profile.h"
+#include "libavcodec/dv.h"
+#include "libavutil/channel_layout.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mathematics.h"
#include "dv.h"
struct DVDemuxContext {
- const DVprofile* sys; /* Current DV profile. E.g.: 525/60, 625/50 */
+ const AVDVProfile* sys; /* Current DV profile. E.g.: 525/60, 625/50 */
AVFormatContext* fctx;
AVStream* vst;
AVStream* ast[4];
shift--;
result = (sample - (256 * shift)) << shift;
} else {
- shift = 0xe - shift;
+ shift = 0xe - shift;
result = ((sample + ((256 * shift) + 1)) << shift) - 1;
}
* a fixed offset and if pack isn't there -- fails. We might want
* to have a fallback mechanism for complete search of missing packs.
*/
-static const uint8_t* dv_extract_pack(uint8_t* frame, enum dv_pack_type t)
+static const uint8_t *dv_extract_pack(uint8_t *frame, enum dv_pack_type t)
{
int offs;
switch (t) {
case dv_audio_source:
- offs = (80*6 + 80*16*3 + 3);
+ offs = (80 * 6 + 80 * 16 * 3 + 3);
break;
case dv_audio_control:
- offs = (80*6 + 80*16*4 + 3);
+ offs = (80 * 6 + 80 * 16 * 4 + 3);
break;
case dv_video_control:
- offs = (80*5 + 48 + 5);
+ offs = (80 * 5 + 48 + 5);
break;
default:
return NULL;
return frame[offs] == t ? &frame[offs] : NULL;
}
+static const int dv_audio_frequency[3] = {
+ 48000, 44100, 32000,
+};
+
/*
* There's a couple of assumptions being made here:
* 1. By default we silence erroneous (0x8000/16bit 0x800/12bit) audio samples.
- * We can pass them upwards when ffmpeg will be ready to deal with them.
+ * We can pass them upwards when libavcodec will be ready to deal with them.
* 2. We don't do software emphasis.
* 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* ppcm[4],
- const DVprofile *sys)
+static int dv_extract_audio(uint8_t *frame, uint8_t **ppcm,
+ const AVDVProfile *sys)
{
int size, chan, i, j, d, of, smpls, freq, quant, half_ch;
uint16_t lc, rc;
- const uint8_t* as_pack;
+ const uint8_t *as_pack;
uint8_t *pcm, ipcm;
as_pack = dv_extract_pack(frame, dv_audio_source);
if (!as_pack) /* No audio ? */
return 0;
- smpls = as_pack[1] & 0x3f; /* samples in this frame - min. samples */
- freq = (as_pack[4] >> 3) & 0x07; /* 0 - 48kHz, 1 - 44,1kHz, 2 - 32kHz */
- quant = as_pack[4] & 0x07; /* 0 - 16bit linear, 1 - 12bit nonlinear */
+ smpls = as_pack[1] & 0x3f; /* samples in this frame - min. samples */
+ freq = as_pack[4] >> 3 & 0x07; /* 0 - 48kHz, 1 - 44,1kHz, 2 - 32kHz */
+ quant = as_pack[4] & 0x07; /* 0 - 16bit linear, 1 - 12bit nonlinear */
if (quant > 1)
- return -1; /* unsupported quantization */
+ return -1; /* unsupported quantization */
- size = (sys->audio_min_samples[freq] + smpls) * 4; /* 2ch, 2bytes */
+ if (freq >= FF_ARRAY_ELEMS(dv_audio_frequency))
+ return AVERROR_INVALIDDATA;
+
+ size = (sys->audio_min_samples[freq] + smpls) * 4; /* 2ch, 2bytes */
half_ch = sys->difseg_size / 2;
/* We work with 720p frames split in half, thus even frames have
* channels 0,1 and odd 2,3. */
ipcm = (sys->height == 720 && !(frame[1] & 0x0C)) ? 2 : 0;
- pcm = ppcm[ipcm++];
/* for each DIF channel */
for (chan = 0; chan < sys->n_difchan; chan++) {
+ /* next stereo channel (50Mbps and 100Mbps only) */
+ pcm = ppcm[ipcm++];
+ if (!pcm)
+ break;
+
/* for each DIF segment */
for (i = 0; i < sys->difseg_size; i++) {
frame += 6 * 80; /* skip DIF segment header */
for (j = 0; j < 9; j++) {
for (d = 8; d < 80; d += 2) {
if (quant == 0) { /* 16bit quantization */
- of = sys->audio_shuffle[i][j] + (d - 8) / 2 * sys->audio_stride;
- if (of*2 >= size)
+ of = sys->audio_shuffle[i][j] +
+ (d - 8) / 2 * sys->audio_stride;
+ if (of * 2 >= size)
continue;
- pcm[of*2] = frame[d+1]; // FIXME: maybe we have to admit
- pcm[of*2+1] = frame[d]; // that DV is a big-endian PCM
- if (pcm[of*2+1] == 0x80 && pcm[of*2] == 0x00)
- pcm[of*2+1] = 0;
+ /* FIXME: maybe we have to admit that DV is a
+ * big-endian PCM */
+ pcm[of * 2] = frame[d + 1];
+ pcm[of * 2 + 1] = frame[d];
+
+ if (pcm[of * 2 + 1] == 0x80 && pcm[of * 2] == 0x00)
+ pcm[of * 2 + 1] = 0;
} else { /* 12bit quantization */
- lc = ((uint16_t)frame[d] << 4) |
- ((uint16_t)frame[d+2] >> 4);
- rc = ((uint16_t)frame[d+1] << 4) |
- ((uint16_t)frame[d+2] & 0x0f);
+ lc = ((uint16_t)frame[d] << 4) |
+ ((uint16_t)frame[d + 2] >> 4);
+ rc = ((uint16_t)frame[d + 1] << 4) |
+ ((uint16_t)frame[d + 2] & 0x0f);
lc = (lc == 0x800 ? 0 : dv_audio_12to16(lc));
rc = (rc == 0x800 ? 0 : dv_audio_12to16(rc));
- of = sys->audio_shuffle[i%half_ch][j] + (d - 8) / 3 * sys->audio_stride;
- if (of*2 >= size)
+ 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: maybe we have to admit
- pcm[of*2+1] = lc >> 8; // that DV is a big-endian PCM
- of = sys->audio_shuffle[i%half_ch+half_ch][j] +
- (d - 8) / 3 * sys->audio_stride;
- pcm[of*2] = rc & 0xff; // FIXME: maybe we have to admit
- pcm[of*2+1] = rc >> 8; // that DV is a big-endian PCM
+ /* FIXME: maybe we have to admit that DV is a
+ * big-endian PCM */
+ pcm[of * 2] = lc & 0xff;
+ pcm[of * 2 + 1] = lc >> 8;
+ of = sys->audio_shuffle[i % half_ch + half_ch][j] +
+ (d - 8) / 3 * sys->audio_stride;
+ /* FIXME: maybe we have to admit that DV is a
+ * big-endian PCM */
+ pcm[of * 2] = rc & 0xff;
+ pcm[of * 2 + 1] = rc >> 8;
++d;
}
}
frame += 16 * 80; /* 15 Video DIFs + 1 Audio DIF */
}
}
-
- /* next stereo channel (50Mbps and 100Mbps only) */
- pcm = ppcm[ipcm++];
- if (!pcm)
- break;
}
return size;
}
-static int dv_extract_audio_info(DVDemuxContext* c, uint8_t* frame)
+static int dv_extract_audio_info(DVDemuxContext *c, uint8_t *frame)
{
- const uint8_t* as_pack;
+ const uint8_t *as_pack;
int freq, stype, smpls, quant, i, ach;
as_pack = dv_extract_pack(frame, dv_audio_source);
return 0;
}
- smpls = as_pack[1] & 0x3f; /* samples in this frame - min. samples */
- freq = (as_pack[4] >> 3) & 0x07; /* 0 - 48kHz, 1 - 44,1kHz, 2 - 32kHz */
- stype = (as_pack[3] & 0x1f); /* 0 - 2CH, 2 - 4CH, 3 - 8CH */
- quant = as_pack[4] & 0x07; /* 0 - 16bit linear, 1 - 12bit nonlinear */
+ smpls = as_pack[1] & 0x3f; /* samples in this frame - min. samples */
+ freq = as_pack[4] >> 3 & 0x07; /* 0 - 48kHz, 1 - 44,1kHz, 2 - 32kHz */
+ stype = as_pack[3] & 0x1f; /* 0 - 2CH, 2 - 4CH, 3 - 8CH */
+ quant = as_pack[4] & 0x07; /* 0 - 16bit linear, 1 - 12bit nonlinear */
+
+ if (freq >= FF_ARRAY_ELEMS(dv_audio_frequency)) {
+ av_log(c->fctx, AV_LOG_ERROR,
+ "Unrecognized audio sample rate index (%d)\n", freq);
+ return 0;
+ }
+
+ if (stype > 3) {
+ av_log(c->fctx, AV_LOG_ERROR, "stype %d is invalid\n", stype);
+ c->ach = 0;
+ return 0;
+ }
/* note: ach counts PAIRS of channels (i.e. stereo channels) */
- ach = ((int[4]){ 1, 0, 2, 4})[stype];
+ ach = ((int[4]) { 1, 0, 2, 4 })[stype];
if (ach == 1 && quant && freq == 2)
ach = 2;
/* Dynamic handling of the audio streams in DV */
for (i = 0; i < ach; i++) {
- if (!c->ast[i]) {
- c->ast[i] = avformat_new_stream(c->fctx, NULL);
- if (!c->ast[i])
- break;
- av_set_pts_info(c->ast[i], 64, 1, 30000);
- c->ast[i]->codec->codec_type = AVMEDIA_TYPE_AUDIO;
- c->ast[i]->codec->codec_id = CODEC_ID_PCM_S16LE;
-
- av_init_packet(&c->audio_pkt[i]);
- c->audio_pkt[i].size = 0;
- c->audio_pkt[i].data = c->audio_buf[i];
- c->audio_pkt[i].stream_index = c->ast[i]->index;
- c->audio_pkt[i].flags |= AV_PKT_FLAG_KEY;
- }
- 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;
- c->ast[i]->start_time = 0;
+ if (!c->ast[i]) {
+ c->ast[i] = avformat_new_stream(c->fctx, NULL);
+ if (!c->ast[i])
+ break;
+ avpriv_set_pts_info(c->ast[i], 64, 1, 30000);
+ c->ast[i]->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
+ c->ast[i]->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE;
+
+ av_init_packet(&c->audio_pkt[i]);
+ c->audio_pkt[i].size = 0;
+ c->audio_pkt[i].data = c->audio_buf[i];
+ c->audio_pkt[i].stream_index = c->ast[i]->index;
+ c->audio_pkt[i].flags |= AV_PKT_FLAG_KEY;
+ }
+ c->ast[i]->codecpar->sample_rate = dv_audio_frequency[freq];
+ c->ast[i]->codecpar->channels = 2;
+ c->ast[i]->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
+ c->ast[i]->codecpar->bit_rate = 2 * dv_audio_frequency[freq] * 16;
+ c->ast[i]->start_time = 0;
}
c->ach = i;
- return (c->sys->audio_min_samples[freq] + smpls) * 4; /* 2ch, 2bytes */;
+ return (c->sys->audio_min_samples[freq] + smpls) * 4; /* 2ch, 2bytes */
}
-static int dv_extract_video_info(DVDemuxContext *c, uint8_t* frame)
+static int dv_extract_video_info(DVDemuxContext *c, uint8_t *frame)
{
- const uint8_t* vsc_pack;
- AVCodecContext* avctx;
+ const uint8_t *vsc_pack;
int apt, is16_9;
int size = 0;
if (c->sys) {
- avctx = c->vst->codec;
-
- av_set_pts_info(c->vst, 64, c->sys->time_base.num,
- c->sys->time_base.den);
- avctx->time_base= c->sys->time_base;
- if (!avctx->width){
- avctx->width = c->sys->width;
- avctx->height = c->sys->height;
+ AVCodecParameters *par = c->vst->codecpar;
+
+ avpriv_set_pts_info(c->vst, 64, c->sys->time_base.num,
+ c->sys->time_base.den);
+ c->vst->avg_frame_rate = av_inv_q(c->vst->time_base);
+ if (!par->width) {
+ par->width = c->sys->width;
+ par->height = c->sys->height;
}
- avctx->pix_fmt = c->sys->pix_fmt;
+ par->format = c->sys->pix_fmt;
/* finding out SAR is a little bit messy */
vsc_pack = dv_extract_pack(frame, dv_video_control);
apt = frame[4] & 0x07;
is16_9 = (vsc_pack && ((vsc_pack[2] & 0x07) == 0x02 ||
- (!apt && (vsc_pack[2] & 0x07) == 0x07)));
+ (!apt && (vsc_pack[2] & 0x07) == 0x07)));
c->vst->sample_aspect_ratio = c->sys->sar[is16_9];
- avctx->bit_rate = av_rescale_q(c->sys->frame_size, (AVRational){8,1},
- c->sys->time_base);
+ par->bit_rate = av_rescale_q(c->sys->frame_size,
+ (AVRational) { 8, 1 },
+ c->sys->time_base);
size = c->sys->frame_size;
}
return size;
}
-/*
- * The following 3 functions constitute our interface to the world
- */
+/* The following 3 functions constitute our interface to the world */
-DVDemuxContext* avpriv_dv_init_demux(AVFormatContext *s)
+DVDemuxContext *avpriv_dv_init_demux(AVFormatContext *s)
{
DVDemuxContext *c;
return NULL;
}
- c->sys = NULL;
- c->fctx = s;
- memset(c->ast, 0, sizeof(c->ast));
- c->ach = 0;
- c->frames = 0;
- c->abytes = 0;
-
- c->vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
- c->vst->codec->codec_id = CODEC_ID_DVVIDEO;
- c->vst->codec->bit_rate = 25000000;
+ c->fctx = s;
+ c->vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
+ c->vst->codecpar->codec_id = AV_CODEC_ID_DVVIDEO;
+ c->vst->codecpar->bit_rate = 25000000;
c->vst->start_time = 0;
return c;
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;
- }
+ 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;
}
int avpriv_dv_produce_packet(DVDemuxContext *c, AVPacket *pkt,
- uint8_t* buf, int buf_size)
+ uint8_t *buf, int buf_size)
{
int size, i;
- uint8_t *ppcm[4] = {0};
+ uint8_t *ppcm[5] = { 0 };
if (buf_size < DV_PROFILE_BYTES ||
- !(c->sys = avpriv_dv_frame_profile(c->sys, buf, buf_size)) ||
+ !(c->sys = av_dv_frame_profile(c->sys, buf, buf_size)) ||
buf_size < c->sys->frame_size) {
- return -1; /* Broken frame, or not enough data */
+ 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(c, buf);
for (i = 0; i < c->ach; i++) {
- c->audio_pkt[i].size = size;
- c->audio_pkt[i].pts = c->abytes * 30000*8 / c->ast[i]->codec->bit_rate;
- ppcm[i] = c->audio_buf[i];
+ c->audio_pkt[i].size = size;
+ c->audio_pkt[i].pts = c->abytes * 30000 * 8 /
+ c->ast[i]->codecpar->bit_rate;
+ ppcm[i] = c->audio_buf[i];
}
- dv_extract_audio(buf, ppcm, c->sys);
+ if (c->ach)
+ dv_extract_audio(buf, ppcm, c->sys);
/* We work with 720p frames split in half, thus even frames have
* channels 0,1 and odd 2,3. */
c->audio_pkt[2].size = c->audio_pkt[3].size = 0;
} else {
c->audio_pkt[0].size = c->audio_pkt[1].size = 0;
- c->abytes += size;
+ c->abytes += size;
}
} else {
c->abytes += size;
pkt->data = buf;
pkt->size = size;
pkt->flags |= AV_PKT_FLAG_KEY;
- pkt->stream_index = c->vst->id;
+ pkt->stream_index = c->vst->index;
pkt->pts = c->frames;
c->frames++;
}
static int64_t dv_frame_offset(AVFormatContext *s, DVDemuxContext *c,
- int64_t timestamp, int flags)
+ int64_t timestamp, int flags)
{
// FIXME: sys may be wrong if last dv_read_packet() failed (buffer is junk)
- const DVprofile* sys = avpriv_dv_codec_profile(c->vst->codec);
+ const AVDVProfile *sys = av_dv_codec_profile(c->vst->codecpar->width, c->vst->codecpar->height,
+ c->vst->codecpar->format);
int64_t offset;
- int64_t size = avio_size(s->pb) - s->data_offset;
- int64_t max_offset = ((size-1) / sys->frame_size) * sys->frame_size;
+ int64_t size = avio_size(s->pb) - s->internal->data_offset;
+ int64_t max_offset = ((size - 1) / sys->frame_size) * sys->frame_size;
offset = sys->frame_size * timestamp;
- if (size >= 0 && offset > max_offset) offset = max_offset;
- else if (offset < 0) offset = 0;
+ if (size >= 0 && offset > max_offset)
+ offset = max_offset;
+ else if (offset < 0)
+ offset = 0;
- return offset + s->data_offset;
+ return offset + s->internal->data_offset;
}
-void dv_offset_reset(DVDemuxContext *c, int64_t frame_offset)
+void ff_dv_offset_reset(DVDemuxContext *c, int64_t frame_offset)
{
- c->frames= frame_offset;
+ c->frames = frame_offset;
if (c->ach)
- c->abytes= av_rescale_q(c->frames, c->sys->time_base,
- (AVRational){8, c->ast[0]->codec->bit_rate});
+ c->abytes = av_rescale_q(c->frames, c->sys->time_base,
+ (AVRational) { 8, c->ast[0]->codecpar->bit_rate });
+
c->audio_pkt[0].size = c->audio_pkt[1].size = 0;
c->audio_pkt[2].size = c->audio_pkt[3].size = 0;
}
************************************************************/
typedef struct RawDVContext {
- DVDemuxContext* dv_demux;
+ DVDemuxContext *dv_demux;
uint8_t buf[DV_MAX_FRAME_SIZE];
} RawDVContext;
-static int dv_read_header(AVFormatContext *s,
- AVFormatParameters *ap)
+static int dv_read_header(AVFormatContext *s)
{
unsigned state, marker_pos = 0;
RawDVContext *c = s->priv_data;
avio_seek(s->pb, -DV_PROFILE_BYTES, SEEK_CUR) < 0)
return AVERROR(EIO);
- c->dv_demux->sys = avpriv_dv_frame_profile(c->dv_demux->sys, c->buf, DV_PROFILE_BYTES);
+ c->dv_demux->sys = av_dv_frame_profile(c->dv_demux->sys,
+ c->buf,
+ DV_PROFILE_BYTES);
if (!c->dv_demux->sys) {
- av_log(s, AV_LOG_ERROR, "Can't determine profile of DV input stream.\n");
+ av_log(s, AV_LOG_ERROR,
+ "Can't determine profile of DV input stream.\n");
return -1;
}
- s->bit_rate = av_rescale_q(c->dv_demux->sys->frame_size, (AVRational){8,1},
+ s->bit_rate = av_rescale_q(c->dv_demux->sys->frame_size,
+ (AVRational) { 8, 1 },
c->dv_demux->sys->time_base);
return 0;
}
-
static int dv_read_packet(AVFormatContext *s, AVPacket *pkt)
{
int size;
}
static int dv_read_seek(AVFormatContext *s, int stream_index,
- int64_t timestamp, int flags)
+ int64_t timestamp, int flags)
{
RawDVContext *r = s->priv_data;
DVDemuxContext *c = r->dv_demux;
int64_t offset = dv_frame_offset(s, c, timestamp, flags);
- dv_offset_reset(c, offset / c->sys->frame_size);
+ if (avio_seek(s->pb, offset, SEEK_SET) < 0)
+ return -1;
- offset = avio_seek(s->pb, offset, SEEK_SET);
- return (offset < 0) ? offset : 0;
+ ff_dv_offset_reset(c, offset / c->sys->frame_size);
+ return 0;
}
static int dv_read_close(AVFormatContext *s)
{
unsigned state, marker_pos = 0;
int i;
- int matches = 0;
+ int matches = 0;
int secondary_matches = 0;
if (p->buf_size < 5)
state = (state << 8) | p->buf[i];
}
- if (matches && p->buf_size / matches < 1024*1024) {
- if (matches > 4 || (secondary_matches >= 10 && p->buf_size / secondary_matches < 24000))
- return AVPROBE_SCORE_MAX*3/4; // not max to avoid dv in mov to match
- return AVPROBE_SCORE_MAX/4;
+ if (matches && p->buf_size / matches < 1024 * 1024) {
+ if (matches > 4 ||
+ (secondary_matches >= 10 &&
+ p->buf_size / secondary_matches < 24000))
+ // not max to avoid dv in mov to match
+ return AVPROBE_SCORE_MAX * 3 / 4;
+ return AVPROBE_SCORE_MAX / 4;
}
return 0;
}
-#if CONFIG_DV_DEMUXER
AVInputFormat ff_dv_demuxer = {
.name = "dv",
- .long_name = NULL_IF_CONFIG_SMALL("DV video format"),
+ .long_name = NULL_IF_CONFIG_SMALL("DV (Digital Video)"),
.priv_data_size = sizeof(RawDVContext),
.read_probe = dv_probe,
.read_header = dv_read_header,
.read_packet = dv_read_packet,
.read_close = dv_read_close,
.read_seek = dv_read_seek,
- .extensions = "dv,dif",
+ .extensions = "dv,dif",
};
-#endif
projects / ffmpeg / blobdiff