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Dzjee, just found out ffmpeg has a function to calculate the buffer size for me, d'oh!

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Original commit message from CVS:
Dzjee, just found out ffmpeg has a function to calculate the buffer size for me, d'oh!
This commit is contained in:
Ronald S. Bultje 2003-06-07 11:43:11 +00:00
parent 0139c8c671
commit 2cc34e4c8f
1 changed files with 20 additions and 40 deletions
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60
ext/ffmpeg/gstffmpegdec.c
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@ -240,11 +240,10 @@ gst_ffmpegdec_get_buffer (AVCodecContext *context,
AVFrame *picture)
{
GstBuffer *buf = NULL;
gint hor_chr_dec = 0, ver_chr_dec = 0, bpp = 0;
gint hor_chr_dec = -1, ver_chr_dec = -1;
gint width, height;
gint alignment;
gulong bufsize = 0;
void *base;
/* set alignment */
if (context->codec_id == CODEC_ID_SVQ1) {
@ -259,46 +258,31 @@ gst_ffmpegdec_get_buffer (AVCodecContext *context,
switch (context->codec_type) {
case CODEC_TYPE_VIDEO:
bufsize = avpicture_get_size (context->pix_fmt,
width, height);
/* find out whether we are planar or packed */
switch (context->pix_fmt) {
case PIX_FMT_YUV420P:
bpp = 12;
hor_chr_dec = ver_chr_dec = 2;
case PIX_FMT_YUV422P:
case PIX_FMT_YUV444P:
case PIX_FMT_YUV410P:
case PIX_FMT_YUV411P:
avcodec_get_chroma_sub_sample (context->pix_fmt,
&hor_chr_dec, &ver_chr_dec);
break;
case PIX_FMT_YUV422:
bpp = 16;
break;
case PIX_FMT_YUV422P:
bpp = 16;
hor_chr_dec = 2; ver_chr_dec = 1;
break;
case PIX_FMT_RGB24:
case PIX_FMT_BGR24:
bpp = 24;
break;
case PIX_FMT_YUV444P:
bpp = 24;
hor_chr_dec = ver_chr_dec = 1;
break;
case PIX_FMT_RGBA32:
bpp = 32;
break;
case PIX_FMT_YUV410P:
bpp = 9;
hor_chr_dec = ver_chr_dec = 4;
break;
case PIX_FMT_YUV411P:
bpp = 12;
hor_chr_dec = 4; ver_chr_dec = 1;
break;
case PIX_FMT_RGB565:
case PIX_FMT_RGB555:
bpp = 16;
/* not planar */
break;
default:
g_assert (0);
break;
}
bufsize = width * height * bpp / 8;
break;
case CODEC_TYPE_AUDIO:
@ -314,23 +298,19 @@ gst_ffmpegdec_get_buffer (AVCodecContext *context,
buf = gst_buffer_new_and_alloc (bufsize);
/* set up planes */
base = GST_BUFFER_DATA (buf);
if (hor_chr_dec > 0 && ver_chr_dec > 0) {
picture->data[0] = GST_BUFFER_DATA (buf);
if (hor_chr_dec >= 0 && ver_chr_dec >= 0) {
picture->linesize[0] = width;
picture->data[0] = base;
picture->linesize[1] = width >> hor_chr_dec;
picture->linesize[2] = width >> hor_chr_dec;
base += width * height;
picture->linesize[1] = picture->linesize[0] / hor_chr_dec;
picture->data[1] = base;
base += (width * height) / (ver_chr_dec * hor_chr_dec);
picture->linesize[2] = picture->linesize[1];
picture->data[2] = base;
picture->data[1] = picture->data[0] + (width * height);
picture->data[2] = picture->data[1] +
((width * height) >> (ver_chr_dec + hor_chr_dec));
} else {
picture->linesize[0] = GST_BUFFER_MAXSIZE (buf) / height;
picture->data[0] = base;
picture->linesize[1] = picture->linesize[2] = 0;
picture->data[1] = picture->data[2] = NULL;
}
picture->linesize[3] = 0;