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Code Issues Releases Activity

Making the number of blocks per macroblock dependent on the DV stream

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specification

Originally committed as revision 14841 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Roman Shaposhnik 2008-08-19 16:01:41 +00:00
parent cb879ec2fb
commit 713c1aa9a6
2 changed files with 11 additions and 6 deletions
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10
libavcodec/dv.c
View File

@ -376,14 +376,14 @@ static inline void dv_decode_video_segment(DVVideoContext *s,
block1 = &sblock[0][0];
mb1 = mb_data;
init_put_bits(&vs_pb, vs_bit_buffer, 5 * 80);
for(mb_index = 0; mb_index < 5; mb_index++, mb1 += 6, block1 += 6 * 64) {
for(mb_index = 0; mb_index < 5; mb_index++, mb1 += s->sys->bpm, block1 += s->sys->bpm * 64) {
/* skip header */
quant = buf_ptr[3] & 0x0f;
buf_ptr += 4;
init_put_bits(&pb, mb_bit_buffer, 80);
mb = mb1;
block = block1;
for(j = 0;j < 6; j++) {
for(j = 0;j < s->sys->bpm; j++) {
last_index = block_sizes[j];
init_get_bits(&gb, buf_ptr, last_index);
@ -426,7 +426,7 @@ static inline void dv_decode_video_segment(DVVideoContext *s,
mb = mb1;
init_get_bits(&gb, mb_bit_buffer, put_bits_count(&pb));
flush_put_bits(&pb);
for(j = 0;j < 6; j++, block += 64, mb++) {
for(j = 0;j < s->sys->bpm; j++, block += 64, mb++) {
if (mb->pos < 64 && get_bits_left(&gb) > 0) {
dv_decode_ac(&gb, mb, block);
/* if still not finished, no need to parse other blocks */
@ -436,7 +436,7 @@ static inline void dv_decode_video_segment(DVVideoContext *s,
}
/* all blocks are finished, so the extra bytes can be used at
the video segment level */
if (j >= 6)
if (j >= s->sys->bpm)
bit_copy(&vs_pb, &gb);
}
@ -449,7 +449,7 @@ static inline void dv_decode_video_segment(DVVideoContext *s,
init_get_bits(&gb, vs_bit_buffer, put_bits_count(&vs_pb));
flush_put_bits(&vs_pb);
for(mb_index = 0; mb_index < 5; mb_index++) {
for(j = 0;j < 6; j++) {
for(j = 0;j < s->sys->bpm; j++) {
if (mb->pos < 64) {
#ifdef VLC_DEBUG
printf("start %d:%d\n", mb_index, j);

7
libavcodec/dvdata.h
View File

@ -49,7 +49,7 @@ typedef struct DVprofile {
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 */
int bpm; /* blocks per macroblock */
int audio_stride; /* size of audio_shuffle table */
int audio_min_samples[3];/* min ammount of audio samples */
/* for 48Khz, 44.1Khz and 32Khz */
@ -2534,6 +2534,7 @@ static const DVprofile dv_profiles[] = {
.sar = {{10, 11}, {40, 33}},
.video_place = dv_place_411,
.pix_fmt = PIX_FMT_YUV411P,
.bpm = 6,
.audio_stride = 90,
.audio_min_samples = { 1580, 1452, 1053 }, /* for 48, 44.1 and 32Khz */
.audio_samples_dist = { 1600, 1602, 1602, 1602, 1602 }, /* per SMPTE-314M */
@ -2551,6 +2552,7 @@ static const DVprofile dv_profiles[] = {
.sar = {{59, 54}, {118, 81}},
.video_place = dv_place_420,
.pix_fmt = PIX_FMT_YUV420P,
.bpm = 6,
.audio_stride = 108,
.audio_min_samples = { 1896, 1742, 1264 }, /* for 48, 44.1 and 32Khz */
.audio_samples_dist = { 1920, 1920, 1920, 1920, 1920 },
@ -2568,6 +2570,7 @@ static const DVprofile dv_profiles[] = {
.sar = {{59, 54}, {118, 81}},
.video_place = dv_place_411P,
.pix_fmt = PIX_FMT_YUV411P,
.bpm = 6,
.audio_stride = 108,
.audio_min_samples = { 1896, 1742, 1264 }, /* for 48, 44.1 and 32Khz */
.audio_samples_dist = { 1920, 1920, 1920, 1920, 1920 },
@ -2585,6 +2588,7 @@ static const DVprofile dv_profiles[] = {
.sar = {{10, 11}, {40, 33}},
.video_place = dv_place_422_525,
.pix_fmt = PIX_FMT_YUV422P,
.bpm = 6,
.audio_stride = 90,
.audio_min_samples = { 1580, 1452, 1053 }, /* for 48, 44.1 and 32Khz */
.audio_samples_dist = { 1600, 1602, 1602, 1602, 1602 }, /* per SMPTE-314M */
@ -2602,6 +2606,7 @@ static const DVprofile dv_profiles[] = {
.sar = {{59, 54}, {118, 81}},
.video_place = dv_place_422_625,
.pix_fmt = PIX_FMT_YUV422P,
.bpm = 6,
.audio_stride = 108,
.audio_min_samples = { 1896, 1742, 1264 }, /* for 48, 44.1 and 32Khz */
.audio_samples_dist = { 1920, 1920, 1920, 1920, 1920 },