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Merge remote-tracking branch 'qatar/master'

Browse Source 
* qatar/master:
  mpegaudiodec: Don't use a nonexistent log context for av_dlog
  avformat: Accept the ISO8601 separate format as input, too
  avformat: Interpret times in ff_iso8601_to_unix_time as UTC
  avutil: Add av_timegm as a public function
  cinepak: Add another special case so that it can handle the following file:
  lagarith: add some RGBA decoding support
  lagarith: Add correct line prediction for RGB

Conflicts:
	doc/APIchanges
	libavcodec/cinepak.c
	libavutil/avutil.h

Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer
2011-11-17 02:44:33 +01:00
parent 4f7ad4c3e4 268fb3f985
commit 8709ba907a
7 changed files with 95 additions and 12 deletions
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77
libavcodec/lagarith.c
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@ -51,6 +51,8 @@ typedef struct LagarithContext {
DSPContext dsp;
int zeros; /**< number of consecutive zero bytes encountered */
int zeros_rem; /**< number of zero bytes remaining to output */
uint8_t *rgb_planes;
int rgb_stride;
} LagarithContext;
/**
@ -245,21 +247,21 @@ static void lag_pred_line(LagarithContext *l, uint8_t *buf,
{
int L, TL;
/* Left pixel is actually prev_row[width] */
L = buf[width - stride - 1];
if (!line) {
/* Left prediction only for first line */
L = l->dsp.add_hfyu_left_prediction(buf + 1, buf + 1,
width - 1, buf[0]);
return;
} else if (line == 1) {
/* Second line, left predict first pixel, the rest of the line is median predicted */
/* FIXME: In the case of RGB this pixel is top predicted */
TL = buf[-stride];
/* Second line, left predict first pixel, the rest of the line is median predicted
* NOTE: In the case of RGB this pixel is top predicted */
TL = l->avctx->pix_fmt == PIX_FMT_YUV420P ? buf[-stride] : L;
} else {
/* Top left is 2 rows back, last pixel */
TL = buf[width - (2 * stride) - 1];
}
/* Left pixel is actually prev_row[width] */
L = buf[width - stride - 1];
add_lag_median_prediction(buf, buf - stride, buf,
width, &L, &TL);
@ -443,6 +445,9 @@ static int lag_decode_frame(AVCodecContext *avctx,
AVFrame *const p = &l->picture;
uint8_t frametype = 0;
uint32_t offset_gu = 0, offset_bv = 0, offset_ry = 9;
int offs[4];
uint8_t *srcs[4], *dst;
int i, j;
AVFrame *picture = data;
@ -458,6 +463,67 @@ static int lag_decode_frame(AVCodecContext *avctx,
offset_bv = AV_RL32(buf + 5);
switch (frametype) {
case FRAME_SOLID_RGBA:
avctx->pix_fmt = PIX_FMT_RGB32;
if (avctx->get_buffer(avctx, p) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
dst = p->data[0];
for (j = 0; j < avctx->height; j++) {
for (i = 0; i < avctx->width; i++)
AV_WN32(dst + i * 4, offset_gu);
dst += p->linesize[0];
}
break;
case FRAME_ARITH_RGBA:
avctx->pix_fmt = PIX_FMT_RGB32;
if (avctx->get_buffer(avctx, p) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
offs[0] = offset_bv;
offs[1] = offset_gu;
offs[2] = 13;
offs[3] = AV_RL32(buf + 9);
if (!l->rgb_planes) {
l->rgb_stride = FFALIGN(avctx->width, 16);
l->rgb_planes = av_malloc(l->rgb_stride * avctx->height * 4);
if (!l->rgb_planes) {
av_log(avctx, AV_LOG_ERROR, "cannot allocate temporary buffer\n");
return AVERROR(ENOMEM);
}
}
for (i = 0; i < 4; i++)
srcs[i] = l->rgb_planes + (i + 1) * l->rgb_stride * avctx->height - l->rgb_stride;
for (i = 0; i < 4; i++)
lag_decode_arith_plane(l, srcs[i],
avctx->width, avctx->height,
-l->rgb_stride, buf + offs[i],
buf_size);
dst = p->data[0];
for (i = 0; i < 4; i++)
srcs[i] = l->rgb_planes + i * l->rgb_stride * avctx->height;
for (j = 0; j < avctx->height; j++) {
for (i = 0; i < avctx->width; i++) {
uint8_t r, g, b, a;
r = srcs[0][i];
g = srcs[1][i];
b = srcs[2][i];
a = srcs[3][i];
r += g;
b += g;
AV_WN32(dst + i * 4, MKBETAG(a, r, g, b));
}
dst += p->linesize[0];
for (i = 0; i < 4; i++)
srcs[i] += l->rgb_stride;
}
break;
case FRAME_ARITH_YV12:
avctx->pix_fmt = PIX_FMT_YUV420P;
@ -504,6 +570,7 @@ static av_cold int lag_decode_end(AVCodecContext *avctx)
if (l->picture.data[0])
avctx->release_buffer(avctx, &l->picture);
av_freep(&l->rgb_planes);
return 0;
}