Chiebot-Mirror
/
FFmpeg
mirror of https://github.com/FFmpeg/FFmpeg.git
8
0
Fork 0
Code Issues Projects Releases Wiki Activity

Merge commit 'fcc455ff2e11ed04603aead1984a92ac3a4be226'

Browse Source 
* commit 'fcc455ff2e11ed04603aead1984a92ac3a4be226':
  avformat/dv: K&R formatting cosmetics

Conflicts:
	libavformat/dv.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
pull/37/head
Michael Niedermayer 12 years ago
parent 89efaabc99 fcc455ff2e
commit 7565aaecb4
1 changed files with 95 additions and 78 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 173
      libavformat/dv.c

173
libavformat/dv.c
Unescape View File

@ -65,7 +65,7 @@ static inline uint16_t dv_audio_12to16(uint16_t sample)
shift--;
result = (sample - (256 * shift)) << shift;
} else {
shift = 0xe - shift;
shift = 0xe - shift;
result = ((sample + ((256 * shift) + 1)) << shift) - 1;
}
@ -77,19 +77,19 @@ static inline uint16_t dv_audio_12to16(uint16_t sample)
* 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;
case dv_timecode:
offs = (80*1 + 3 + 3);
@ -113,29 +113,29 @@ static const int dv_audio_frequency[3] = {
* 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],
static int dv_extract_audio(uint8_t *frame, uint8_t *ppcm[4],
const DVprofile *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 */
if (freq >= FF_ARRAY_ELEMS(dv_audio_frequency))
return AVERROR_INVALIDDATA;
size = (sys->audio_min_samples[freq] + smpls) * 4; /* 2ch, 2bytes */
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
@ -169,32 +169,41 @@ static int dv_extract_audio(uint8_t* frame, uint8_t* ppcm[4],
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;
}
}
@ -207,9 +216,9 @@ static int dv_extract_audio(uint8_t* frame, uint8_t* ppcm[4],
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);
@ -218,10 +227,10 @@ static int dv_extract_audio_info(DVDemuxContext* c, uint8_t* frame)
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,
@ -236,7 +245,7 @@ static int dv_extract_audio_info(DVDemuxContext* c, uint8_t* frame)
}
/* 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;
@ -256,21 +265,21 @@ static int dv_extract_audio_info(DVDemuxContext* c, uint8_t* frame)
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->sample_rate = dv_audio_frequency[freq];
c->ast[i]->codec->channels = 2;
c->ast[i]->codec->channel_layout = AV_CH_LAYOUT_STEREO;
c->ast[i]->codec->bit_rate = 2 * dv_audio_frequency[freq] * 16;
c->ast[i]->start_time = 0;
c->ast[i]->codec->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;
AVCodecContext *avctx;
int apt, is16_9;
int size = 0;
@ -279,7 +288,7 @@ static int dv_extract_video_info(DVDemuxContext *c, uint8_t* frame)
avpriv_set_pts_info(c->vst, 64, c->sys->time_base.num,
c->sys->time_base.den);
avctx->time_base= c->sys->time_base;
avctx->time_base = c->sys->time_base;
/* finding out SAR is a little bit messy */
vsc_pack = dv_extract_pack(frame, dv_video_control);
@ -287,7 +296,8 @@ static int dv_extract_video_info(DVDemuxContext *c, uint8_t* frame)
is16_9 = (vsc_pack && ((vsc_pack[2] & 0x07) == 0x02 ||
(!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},
avctx->bit_rate = av_rescale_q(c->sys->frame_size,
(AVRational) { 8, 1 },
c->sys->time_base);
size = c->sys->frame_size;
}
@ -310,11 +320,9 @@ static int dv_extract_timecode(DVDemuxContext* c, uint8_t* frame, char *tc)
return 1;
}
/*
* 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;
@ -344,9 +352,9 @@ int avpriv_dv_get_packet(DVDemuxContext *c, AVPacket *pkt)
for (i = 0; i < c->ach; i++) {
if (c->ast[i] && c->audio_pkt[i].size) {
*pkt = c->audio_pkt[i];
*pkt = c->audio_pkt[i];
c->audio_pkt[i].size = 0;
size = pkt->size;
size = pkt->size;
break;
}
}
@ -355,10 +363,10 @@ int avpriv_dv_get_packet(DVDemuxContext *c, AVPacket *pkt)
}
int avpriv_dv_produce_packet(DVDemuxContext *c, AVPacket *pkt,
uint8_t* buf, int buf_size, int64_t pos)
uint8_t *buf, int buf_size, int64_t pos)
{
int size, i;
uint8_t *ppcm[4] = {0};
uint8_t *ppcm[4] = { 0 };
if (buf_size < DV_PROFILE_BYTES ||
!(c->sys = avpriv_dv_frame_profile(c->sys, buf, buf_size)) ||
@ -372,7 +380,8 @@ int avpriv_dv_produce_packet(DVDemuxContext *c, AVPacket *pkt,
for (i = 0; i < c->ach; i++) {
c->audio_pkt[i].pos = pos;
c->audio_pkt[i].size = size;
c->audio_pkt[i].pts = c->abytes * 30000 * 8 / c->ast[i]->codec->bit_rate;
c->audio_pkt[i].pts = c->abytes * 30000 * 8 /
c->ast[i]->codec->bit_rate;
ppcm[i] = c->audio_buf[i];
}
if (c->ach)
@ -385,7 +394,7 @@ int avpriv_dv_produce_packet(DVDemuxContext *c, AVPacket *pkt,
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;
@ -407,30 +416,32 @@ int avpriv_dv_produce_packet(DVDemuxContext *c, AVPacket *pkt,
}
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 DVprofile *sys = avpriv_dv_codec_profile(c->vst->codec);
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->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;
}
void ff_dv_offset_reset(DVDemuxContext *c, int64_t frame_offset)
{
c->frames= frame_offset;
c->frames = frame_offset;
if (c->ach) {
if (c->sys) {
c->abytes= av_rescale_q(c->frames, c->sys->time_base,
(AVRational){8, c->ast[0]->codec->bit_rate});
}else
c->abytes = av_rescale_q(c->frames, c->sys->time_base,
(AVRational) { 8, c->ast[0]->codec->bit_rate });
} else
av_log(c->fctx, AV_LOG_ERROR, "cannot adjust audio bytes\n");
}
c->audio_pkt[0].size = c->audio_pkt[1].size = 0;
@ -442,7 +453,7 @@ void ff_dv_offset_reset(DVDemuxContext *c, int64_t frame_offset)
************************************************************/
typedef struct RawDVContext {
DVDemuxContext* dv_demux;
DVDemuxContext *dv_demux;
uint8_t buf[DV_MAX_FRAME_SIZE];
} RawDVContext;
@ -508,13 +519,17 @@ static int dv_read_header(AVFormatContext *s)
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 = avpriv_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);
if (s->pb->seekable)
@ -523,7 +538,6 @@ static int dv_read_header(AVFormatContext *s)
return 0;
}
static int dv_read_packet(AVFormatContext *s, AVPacket *pkt)
{
int size;
@ -546,7 +560,7 @@ static int dv_read_packet(AVFormatContext *s, AVPacket *pkt)
}
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;
@ -570,7 +584,7 @@ static int dv_probe(AVProbeData *p)
{
unsigned state, marker_pos = 0;
int i;
int matches = 0;
int matches = 0;
int secondary_matches = 0;
if (p->buf_size < 5)
@ -591,10 +605,13 @@ static int dv_probe(AVProbeData *p)
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;
}

Write Preview
Loading…
Cancel
Save