FFmpeg: libavcodec/v410dec.c Source File

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libavcodec

v410dec.c

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1 /*

2 * v410 decoder

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/common.h"

24 #include "libavutil/intreadwrite.h"

25 #include "avcodec.h"

26 #include "internal.h"

28 static av_cold int v410_decode_init(AVCodecContext *avctx)

29 {

30 avctx->pix_fmt = AV_PIX_FMT_YUV444P10;

31 avctx->bits_per_raw_sample = 10;

33 if (avctx->width & 1) {

34 if (avctx->err_recognition & AV_EF_EXPLODE) {

35 av_log(avctx, AV_LOG_ERROR, "v410 requires width to be even.\n");

36 return AVERROR_INVALIDDATA;

37 } else {

38 av_log(avctx, AV_LOG_WARNING, "v410 requires width to be even, continuing anyway.\n");

39 }

40 }

42 return 0;

43 }

45 static int v410_decode_frame(AVCodecContext *avctx, void *data,

46 int *got_frame, AVPacket *avpkt)

47 {

48 AVFrame *pic = data;

49 uint8_t *src = avpkt->data;

50 uint16_t *y, *u, *v;

51 uint32_t val;

52 int i, j, ret;

54 if (avpkt->size < 4 * avctx->height * avctx->width) {

55 av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");

56 return AVERROR(EINVAL);

57 }

59 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)

60 return ret;

62 pic->key_frame = 1;

63 pic->pict_type = AV_PICTURE_TYPE_I;

65 y = (uint16_t *)pic->data[0];

66 u = (uint16_t *)pic->data[1];

67 v = (uint16_t *)pic->data[2];

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

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

71 val = AV_RL32(src);

73 u[j] = (val >> 2) & 0x3FF;

74 y[j] = (val >> 12) & 0x3FF;

75 v[j] = (val >> 22);

77 src += 4;

78 }

80 y += pic->linesize[0] >> 1;

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

82 v += pic->linesize[2] >> 1;

83 }

85 *got_frame = 1;

87 return avpkt->size;

88 }

90 AVCodec ff_v410_decoder = {

91 .name = "v410",

92 .type = AVMEDIA_TYPE_VIDEO,

93 .id = AV_CODEC_ID_V410,

94 .init = v410_decode_init,

95 .decode = v410_decode_frame,

96 .capabilities = CODEC_CAP_DR1,

97 .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:4:4 10-bit"),

98 };

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