FFmpeg: libavcodec/rawenc.c Source File

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libavcodec

rawenc.c

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1 /*

2 * Raw Video Encoder

4 *

5 * This file is part of FFmpeg.

6 *

7 * FFmpeg is free software; you can redistribute it and/or

8 * modify it under the terms of the GNU Lesser General Public

9 * License as published by the Free Software Foundation; either

10 * version 2.1 of the License, or (at your option) any later version.

11 *

12 * FFmpeg is distributed in the hope that it will be useful,

13 * but WITHOUT ANY WARRANTY; without even the implied warranty of

14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

15 * Lesser General Public License for more details.

16 *

17 * You should have received a copy of the GNU Lesser General Public

18 * License along with FFmpeg; if not, write to the Free Software

19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

20 */

22 /**

23 * @file

24 * Raw Video Encoder

25 */

27 #include "avcodec.h"

28 #include "raw.h"

29 #include "internal.h"

30 #include "libavutil/pixdesc.h"

31 #include "libavutil/intreadwrite.h"

32 #include "libavutil/internal.h"

34 static av_cold int raw_init_encoder(AVCodecContext *avctx)

35 {

36 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);

38 avctx->coded_frame = avctx->priv_data;

39 avcodec_get_frame_defaults(avctx->coded_frame);

40 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;

41 avctx->bits_per_coded_sample = av_get_bits_per_pixel(desc);

42 if(!avctx->codec_tag)

43 avctx->codec_tag = avcodec_pix_fmt_to_codec_tag(avctx->pix_fmt);

44 return 0;

45 }

47 static int raw_encode(AVCodecContext *avctx, AVPacket *pkt,

48 const AVFrame *frame, int *got_packet)

49 {

50 int ret = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);

52 if (ret < 0)

53 return ret;

55 if ((ret = ff_alloc_packet2(avctx, pkt, ret)) < 0)

56 return ret;

57 if ((ret = avpicture_layout((const AVPicture *)frame, avctx->pix_fmt, avctx->width,

58 avctx->height, pkt->data, pkt->size)) < 0)

59 return ret;

61 if(avctx->codec_tag == AV_RL32("yuv2") && ret > 0 &&

62 avctx->pix_fmt == AV_PIX_FMT_YUYV422) {

63 int x;

64 for(x = 1; x < avctx->height*avctx->width*2; x += 2)

65 pkt->data[x] ^= 0x80;

66 }

67 pkt->flags |= AV_PKT_FLAG_KEY;

68 *got_packet = 1;

69 return 0;

70 }

72 AVCodec ff_rawvideo_encoder = {

73 .name = "rawvideo",

74 .long_name = NULL_IF_CONFIG_SMALL("raw video"),

75 .type = AVMEDIA_TYPE_VIDEO,

76 .id = AV_CODEC_ID_RAWVIDEO,

77 .priv_data_size = sizeof(AVFrame),

78 .init = raw_init_encoder,

79 .encode2 = raw_encode,

80 };

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