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avformat/dv: K&R formatting cosmetics

tags/n2.1
Diego Biurrun 12 years ago
parent
abe5268c33
commit
fcc455ff2e
1 changed files with 97 additions and 79 deletions
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  1. +97
    -79
      libavformat/dv.c

+ 97
- 79
libavformat/dv.c View File

@@ -63,7 +63,7 @@ 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;
}

@@ -75,19 +75,19 @@ 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;
default:
return NULL;
@@ -108,29 +108,29 @@ 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
@@ -158,32 +158,41 @@ 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;
}
}
@@ -196,9 +205,9 @@ 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);
@@ -207,10 +216,10 @@ 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,
@@ -225,7 +234,7 @@ 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;

@@ -245,21 +254,21 @@ 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;

@@ -268,9 +277,9 @@ 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;
if (!avctx->width){
avctx->width = c->sys->width;
avctx->time_base = c->sys->time_base;
if (!avctx->width) {
avctx->width = c->sys->width;
avctx->height = c->sys->height;
}
avctx->pix_fmt = c->sys->pix_fmt;
@@ -281,18 +290,17 @@ 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;
}
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;

@@ -322,9 +330,9 @@ 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;
}
}
@@ -333,10 +341,10 @@ int avpriv_dv_get_packet(DVDemuxContext *c, AVPacket *pkt)
}

int avpriv_dv_produce_packet(DVDemuxContext *c, AVPacket *pkt,
uint8_t* buf, int buf_size)
uint8_t *buf, int buf_size)
{
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)) ||
@@ -349,7 +357,8 @@ int avpriv_dv_produce_packet(DVDemuxContext *c, AVPacket *pkt,
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;
c->audio_pkt[i].pts = c->abytes * 30000 * 8 /
c->ast[i]->codec->bit_rate;
ppcm[i] = c->audio_buf[i];
}
if (c->ach)
@@ -362,7 +371,7 @@ 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;
@@ -383,28 +392,31 @@ 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)
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]->codec->bit_rate });

c->audio_pkt[0].size = c->audio_pkt[1].size = 0;
c->audio_pkt[2].size = c->audio_pkt[3].size = 0;
}
@@ -414,7 +426,7 @@ 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;

@@ -448,19 +460,22 @@ 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);

return 0;
}


static int dv_read_packet(AVFormatContext *s, AVPacket *pkt)
{
int size;
@@ -482,7 +497,7 @@ 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;
@@ -506,7 +521,7 @@ 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)
@@ -527,10 +542,13 @@ 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;
}


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