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* introducing new public interface in imgconvert.c

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+ avcodec_get_pix_fmt
         converts textual representation of pixel format into
	 the actual id. Complements avcodec_get_pix_fmt_name.
       + avpicture_layout
         serializes given picture into a flat array.
	 Complements avpicture_fill.

   * adding a new option -pix_fmt to the ffmpeg, in order to control
     pixel format for the codecs that do support it, like rawvideo,
     for example.

   * reducing complexity of the rawvideo codec by splitting it in two
     and making it more reliable via hooking up to the avpicture_layout.
     Plus adding new FourCC as described here: http://www.fourcc.org

   * A tiny fix for avienc.c that makes avih and video strf consistent
     regarding codec FourCC.

Originally committed as revision 1842 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Roman Shaposhnik
2003-05-07 19:01:45 +00:00
parent 4e80eb21af
commit 631670888d
7 changed files with 140 additions and 120 deletions
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171
libavcodec/raw.c
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@@ -24,6 +24,12 @@
#include "avcodec.h"
typedef struct RawVideoContext {
unsigned char * buffer; /* block of memory for holding one frame */
unsigned char * p; /* current position in buffer */
int length; /* number of bytes in buffer */
AVFrame pic; ///< AVCodecContext.coded_frame
} RawVideoContext;
typedef struct PixleFormatTag {
int pix_fmt;
@@ -31,8 +37,19 @@ typedef struct PixleFormatTag {
} PixelFormatTag;
const PixelFormatTag pixelFormatTags[] = {
{ PIX_FMT_YUV422, MKTAG('Y', '4', '2', '2') },
{ PIX_FMT_YUV420P, MKTAG('I', '4', '2', '0') },
{ PIX_FMT_YUV420P, MKTAG('I', '4', '2', '0') }, /* Planar formats */
{ PIX_FMT_YUV420P, MKTAG('I', 'Y', 'U', 'V') },
{ PIX_FMT_YUV410P, MKTAG('Y', 'U', 'V', '9') },
{ PIX_FMT_YUV411P, MKTAG('Y', '4', '1', 'B') },
{ PIX_FMT_YUV422P, MKTAG('Y', '4', '2', 'B') },
{ PIX_FMT_GRAY8, MKTAG('Y', '8', '0', '0') },
{ PIX_FMT_GRAY8, MKTAG(' ', ' ', 'Y', '8') },
{ PIX_FMT_YUV422, MKTAG('Y', '4', '2', '2') }, /* Packed formats */
{ PIX_FMT_YUV422, MKTAG('U', 'Y', 'V', 'Y') },
{ PIX_FMT_GRAY8, MKTAG('G', 'R', 'E', 'Y') },
{ -1, 0 },
};
@@ -47,35 +64,37 @@ static int findPixelFormat(unsigned int fourcc)
return PIX_FMT_YUV420P;
}
static unsigned int findFourCC(int fmt)
{
const PixelFormatTag * tags = pixelFormatTags;
while (tags->pix_fmt >= 0) {
if (tags->pix_fmt == fmt)
return tags->fourcc;
tags++;
}
return 0;
}
typedef struct RawVideoContext {
unsigned char * buffer; /* block of memory for holding one frame */
unsigned char * p; /* current position in buffer */
int length; /* number of bytes in buffer */
AVFrame pic; ///< AVCodecContext.coded_frame
} RawVideoContext;
/* RAW Decoder Implementation */
static int raw_init(AVCodecContext *avctx)
static int raw_init_decoder(AVCodecContext *avctx)
{
RawVideoContext *context = avctx->priv_data;
if (avctx->codec_tag) {
avctx->pix_fmt = findPixelFormat(avctx->codec_tag);
}
context->length = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
context->buffer = av_malloc(context->length);
context->p = context->buffer;
context->pic.pict_type= FF_I_TYPE;
context->pic.key_frame= 1;
if (avctx->codec_tag)
avctx->pix_fmt = findPixelFormat(avctx->codec_tag);
context->length = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
context->buffer = av_malloc(context->length);
context->p = context->buffer;
context->pic.pict_type = FF_I_TYPE;
context->pic.key_frame = 1;
avctx->coded_frame= &context->pic;
if (! context->buffer) {
if (!context->buffer)
return -1;
}
return 0;
}
@@ -110,102 +129,48 @@ static int raw_decode(AVCodecContext *avctx,
return bytesNeeded;
}
static int raw_close(AVCodecContext *avctx)
static int raw_close_decoder(AVCodecContext *avctx)
{
RawVideoContext *context = avctx->priv_data;
av_freep(&context->buffer);
return 0;
}
av_freep(& context->buffer);
/* RAW Encoder Implementation */
static int raw_init_encoder(AVCodecContext *avctx)
{
avctx->coded_frame = (AVPicture*)avctx->priv_data;
avctx->coded_frame->pict_type = FF_I_TYPE;
avctx->coded_frame->key_frame = 1;
avctx->codec_tag = findFourCC(avctx->pix_fmt);
return 0;
}
static int raw_encode(AVCodecContext *avctx,
unsigned char *frame, int buf_size, void *data)
{
AVPicture * picture = data;
unsigned char *src;
unsigned char *dest = frame;
int i, j;
int w = avctx->width;
int h = avctx->height;
int size = avpicture_get_size(avctx->pix_fmt, w, h);
if (size > buf_size) {
return -1;
}
switch(avctx->pix_fmt) {
case PIX_FMT_YUV420P:
for(i=0;i<3;i++) {
if (i == 1) {
w >>= 1;
h >>= 1;
}
src = picture->data[i];
for(j=0;j<h;j++) {
memcpy(dest, src, w);
dest += w;
src += picture->linesize[i];
}
}
break;
case PIX_FMT_YUV422P:
for(i=0;i<3;i++) {
if (i == 1) {
w >>= 1;
}
src = picture->data[i];
for(j=0;j<h;j++) {
memcpy(dest, src, w);
dest += w;
src += picture->linesize[i];
}
}
break;
case PIX_FMT_YUV444P:
for(i=0;i<3;i++) {
src = picture->data[i];
for(j=0;j<h;j++) {
memcpy(dest, src, w);
dest += w;
src += picture->linesize[i];
}
}
break;
case PIX_FMT_YUV422:
src = picture->data[0];
for(j=0;j<h;j++) {
memcpy(dest, src, w * 2);
dest += w * 2;
src += picture->linesize[0];
}
break;
case PIX_FMT_RGB24:
case PIX_FMT_BGR24:
src = picture->data[0];
for(j=0;j<h;j++) {
memcpy(dest, src, w * 3);
dest += w * 3;
src += picture->linesize[0];
}
break;
default:
return -1;
}
return size;
return avpicture_layout((AVPicture *)data, avctx->pix_fmt, avctx->width,
avctx->height, frame, buf_size);
}
AVCodec rawvideo_encoder = {
"rawvideo",
CODEC_TYPE_VIDEO,
CODEC_ID_RAWVIDEO,
sizeof(AVFrame),
raw_init_encoder,
raw_encode,
};
AVCodec rawvideo_codec = {
AVCodec rawvideo_decoder = {
"rawvideo",
CODEC_TYPE_VIDEO,
CODEC_ID_RAWVIDEO,
sizeof(RawVideoContext),
raw_init,
raw_encode,
raw_close,
raw_init_decoder,
NULL,
raw_close_decoder,
raw_decode,
};