FFmpeg: libavcodec/v308enc.c Source File

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libavcodec

v308enc.c

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1 /*

2 * v308 encoder

3 *

5 *

6 * This file is part of FFmpeg.

7 *

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

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

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

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

12 *

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

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

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

16 * Lesser General Public License for more details.

17 *

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

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

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

21 */

23 #include "libavutil/intreadwrite.h"

24 #include "avcodec.h"

25 #include "codec_internal.h"

26 #include "encode.h"

27 #include "internal.h"

29 static av_cold int v308_encode_init(AVCodecContext *avctx)

30 {

31 if (avctx->width & 1) {

32 av_log(avctx, AV_LOG_ERROR, "v308 requires width to be even.\n");

33 return AVERROR_INVALIDDATA;

34 }

36 avctx->bits_per_coded_sample = 24;

37 avctx->bit_rate = ff_guess_coded_bitrate(avctx);

39 return 0;

40 }

42 static int v308_encode_frame(AVCodecContext *avctx, AVPacket *pkt,

43 const AVFrame *pic, int *got_packet)

44 {

45 uint8_t *dst;

46 uint8_t *y, *u, *v;

47 int i, j, ret;

49 ret = ff_get_encode_buffer(avctx, pkt, avctx->width * avctx->height * 3, 0);

50 if (ret < 0)

51 return ret;

52 dst = pkt->data;

54 y = pic->data[0];

55 u = pic->data[1];

56 v = pic->data[2];

58 for (i = 0; i < avctx->height; i++) {

59 for (j = 0; j < avctx->width; j++) {

60 *dst++ = v[j];

61 *dst++ = y[j];

62 *dst++ = u[j];

63 }

64 y += pic->linesize[0];

65 u += pic->linesize[1];

66 v += pic->linesize[2];

67 }

69 *got_packet = 1;

70 return 0;

71 }

73 const FFCodec ff_v308_encoder = {

74 .p.name = "v308",

75 .p.long_name = NULL_IF_CONFIG_SMALL("Uncompressed packed 4:4:4"),

76 .p.type = AVMEDIA_TYPE_VIDEO,

77 .p.id = AV_CODEC_ID_V308,

78 .p.capabilities = AV_CODEC_CAP_DR1,

79 .init = v308_encode_init,

80 FF_CODEC_ENCODE_CB(v308_encode_frame),

81 .p.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV444P, AV_PIX_FMT_NONE },

82 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,

83 };

ff_guess_coded_bitrate

int64_t ff_guess_coded_bitrate(AVCodecContext *avctx)

Get an estimated video bitrate based on frame size, frame rate and coded bits per pixel.

Definition: utils.c:1136

AVPixelFormat

Pixel format.

Definition: pixfmt.h:64

AV_CODEC_ID_V308

@ AV_CODEC_ID_V308

Definition: codec_id.h:256

#define u(width, name, range_min, range_max)

Definition: cbs_h2645.c:262

AVFrame

This structure describes decoded (raw) audio or video data.

Definition: frame.h:325

internal.h

AVPacket::data

uint8_t * data

Definition: packet.h:374

encode.h

FFCodec

Definition: codec_internal.h:112

AVFrame::data

uint8_t * data[AV_NUM_DATA_POINTERS]

pointer to the picture/channel planes.

Definition: frame.h:346

FFCodec::p

AVCodec p

The public AVCodec.

Definition: codec_internal.h:116

FF_CODEC_ENCODE_CB

#define FF_CODEC_ENCODE_CB(func)

Definition: codec_internal.h:263

pkt

AVPacket * pkt

Definition: movenc.c:59

AV_LOG_ERROR

#define AV_LOG_ERROR

Something went wrong and cannot losslessly be recovered.

Definition: log.h:180

av_cold

#define av_cold

Definition: attributes.h:90

intreadwrite.h

v308_encode_frame

static int v308_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pic, int *got_packet)

Definition: v308enc.c:42

AVCodecContext::bit_rate

int64_t bit_rate

the average bitrate

Definition: avcodec.h:439

AV_CODEC_CAP_DR1

#define AV_CODEC_CAP_DR1

Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.

Definition: codec.h:52

NULL_IF_CONFIG_SMALL

#define NULL_IF_CONFIG_SMALL(x)

Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.

Definition: internal.h:117

codec_internal.h

AVCodecContext::bits_per_coded_sample

int bits_per_coded_sample

bits per sample/pixel from the demuxer (needed for huffyuv).

Definition: avcodec.h:1441

#define i(width, name, range_min, range_max)

Definition: cbs_h2645.c:269

ff_v308_encoder

const FFCodec ff_v308_encoder

Definition: v308enc.c:73

FF_CODEC_CAP_INIT_THREADSAFE

#define FF_CODEC_CAP_INIT_THREADSAFE

The codec does not modify any global variables in the init function, allowing to call the init functi...

Definition: codec_internal.h:31

AVCodec::name

const char * name

Name of the codec implementation.

Definition: codec.h:203

AVCodecContext::height

int height

Definition: avcodec.h:562

avcodec.h

ret

Definition: filter_design.txt:187

AVCodecContext

main external API structure.

Definition: avcodec.h:389

ff_get_encode_buffer

int ff_get_encode_buffer(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int flags)

Get a buffer for a packet.

Definition: encode.c:79

AV_PIX_FMT_NONE

@ AV_PIX_FMT_NONE

Definition: pixfmt.h:65

AV_PIX_FMT_YUV444P

@ AV_PIX_FMT_YUV444P

planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)

Definition: pixfmt.h:71

AVMEDIA_TYPE_VIDEO

@ AVMEDIA_TYPE_VIDEO

Definition: avutil.h:201

AVPacket

This structure stores compressed data.

Definition: packet.h:351

AVCodecContext::width

int width

picture width / height.

Definition: avcodec.h:562

AVFrame::linesize

int linesize[AV_NUM_DATA_POINTERS]

For video, a positive or negative value, which is typically indicating the size in bytes of each pict...

Definition: frame.h:370

av_log

#define av_log(a,...)

Definition: tableprint_vlc.h:27

AVERROR_INVALIDDATA

#define AVERROR_INVALIDDATA

Invalid data found when processing input.

Definition: error.h:61

v308_encode_init

static av_cold int v308_encode_init(AVCodecContext *avctx)

Definition: v308enc.c:29

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