* Raw Video Codec
* Copyright (c) 2001 Fabrice Bellard.
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-
+
/**
* @file raw.c
* Raw Video Codec
*/
-
+
#include "avcodec.h"
+typedef struct RawVideoContext {
+ unsigned char * buffer; /* block of memory for holding one frame */
+ int length; /* number of bytes in buffer */
+ AVFrame pic; ///< AVCodecContext.coded_frame
+} RawVideoContext;
-typedef struct PixleFormatTag {
+typedef struct PixelFormatTag {
int pix_fmt;
unsigned int fourcc;
} PixelFormatTag;
const PixelFormatTag pixelFormatTags[] = {
- { PIX_FMT_YUV422, MKTAG('Y', '4', '2', '2') },
+ { PIX_FMT_YUV420P, MKTAG('I', '4', '2', '0') }, /* Planar formats */
+ { PIX_FMT_YUV420P, MKTAG('I', 'Y', 'U', 'V') },
+ { PIX_FMT_YUV420P, MKTAG('Y', 'V', '1', '2') },
+ { 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', 'U', 'Y', '2') }, /* Packed formats */
+ { PIX_FMT_YUV422, MKTAG('Y', '4', '2', '2') },
+ { PIX_FMT_UYVY422, MKTAG('U', 'Y', 'V', 'Y') },
+ { PIX_FMT_GRAY8, MKTAG('G', 'R', 'E', 'Y') },
+
+ /* quicktime */
+ { PIX_FMT_UYVY422, MKTAG('2', 'v', 'u', 'y') },
+
{ -1, 0 },
};
return PIX_FMT_YUV420P;
}
+unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat 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 */
-} 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);
+ if (avctx->codec_tag)
+ avctx->pix_fmt = findPixelFormat(avctx->codec_tag);
+ else if (avctx->bits_per_sample){
+ switch(avctx->bits_per_sample){
+ case 8: avctx->pix_fmt= PIX_FMT_PAL8 ; break;
+ case 15: avctx->pix_fmt= PIX_FMT_RGB555; break;
+ case 16: avctx->pix_fmt= PIX_FMT_RGB565; break;
+ case 24: avctx->pix_fmt= PIX_FMT_BGR24 ; break;
+ case 32: avctx->pix_fmt= PIX_FMT_RGBA32; break;
+ }
}
- context->length = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
- context->buffer = av_malloc(context->length);
- context->p = context->buffer;
+ context->length = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
+ context->buffer = av_malloc(context->length);
+ context->pic.pict_type = FF_I_TYPE;
+ context->pic.key_frame = 1;
- if (! context->buffer) {
+ avctx->coded_frame= &context->pic;
+
+ if (!context->buffer)
return -1;
- }
return 0;
}
+static void flip(AVCodecContext *avctx, AVPicture * picture){
+ if(!avctx->codec_tag && avctx->bits_per_sample && picture->linesize[2]==0){
+ picture->data[0] += picture->linesize[0] * (avctx->height-1);
+ picture->linesize[0] *= -1;
+ }
+}
+
static int raw_decode(AVCodecContext *avctx,
- void *data, int *data_size,
- uint8_t *buf, int buf_size)
+ void *data, int *data_size,
+ uint8_t *buf, int buf_size)
{
RawVideoContext *context = avctx->priv_data;
+ AVFrame * frame = (AVFrame *) data;
AVPicture * picture = (AVPicture *) data;
- /* Early out without copy if packet size == frame size */
- if (buf_size == context->length && context->p == context->buffer) {
- avpicture_fill(picture, buf, avctx->pix_fmt, avctx->width, avctx->height);
- *data_size = sizeof(AVPicture);
- return buf_size;
+ frame->interlaced_frame = avctx->coded_frame->interlaced_frame;
+ frame->top_field_first = avctx->coded_frame->top_field_first;
+
+ if(buf_size < context->length - (avctx->pix_fmt==PIX_FMT_PAL8 ? 256*4 : 0))
+ return -1;
+
+ avpicture_fill(picture, buf, avctx->pix_fmt, avctx->width, avctx->height);
+ if(avctx->pix_fmt==PIX_FMT_PAL8 && buf_size < context->length){
+ frame->data[1]= context->buffer;
+ }
+ if (avctx->palctrl && avctx->palctrl->palette_changed) {
+ memcpy(frame->data[1], avctx->palctrl->palette, AVPALETTE_SIZE);
+ avctx->palctrl->palette_changed = 0;
}
- int bytesNeeded = context->length - (context->p - context->buffer);
- if (buf_size < bytesNeeded) {
- memcpy(context->p, buf, buf_size);
- context->p += buf_size;
- *data_size = 0;
- return buf_size;
+ flip(avctx, picture);
+
+ if (avctx->codec_tag == MKTAG('Y', 'V', '1', '2'))
+ {
+ // swap fields
+ unsigned char *tmp = picture->data[1];
+ picture->data[1] = picture->data[2];
+ picture->data[2] = tmp;
}
- memcpy(context->p, buf, bytesNeeded);
- context->p = context->buffer;
- avpicture_fill(picture, context->buffer, avctx->pix_fmt, avctx->width, avctx->height);
*data_size = sizeof(AVPicture);
- return bytesNeeded;
+ return buf_size;
}
-static int raw_close(AVCodecContext *avctx)
+static int raw_close_decoder(AVCodecContext *avctx)
{
RawVideoContext *context = avctx->priv_data;
- av_freep(& context->buffer);
+ av_freep(&context->buffer);
+ return 0;
+}
+/* RAW Encoder Implementation */
+#ifdef CONFIG_RAWVIDEO_ENCODER
+static int raw_init_encoder(AVCodecContext *avctx)
+{
+ avctx->coded_frame = (AVFrame *)avctx->priv_data;
+ avctx->coded_frame->pict_type = FF_I_TYPE;
+ avctx->coded_frame->key_frame = 1;
+ if(!avctx->codec_tag)
+ avctx->codec_tag = avcodec_pix_fmt_to_codec_tag(avctx->pix_fmt);
return 0;
}
static int raw_encode(AVCodecContext *avctx,
- unsigned char *frame, int buf_size, void *data)
+ 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,
+};
+#endif // CONFIG_RAWVIDEO_ENCODER
-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,
};
projects / ffmpeg / blobdiff