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  1. /*
  2. * AVID Meridien encoder
  3. *
  4. * Copyright (c) 2012 Carl Eugen Hoyos
  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. */
  22. #include "avcodec.h"
  23. #include "internal.h"
  24. static av_cold int avui_encode_init(AVCodecContext *avctx)
  25. {
  26. avctx->coded_frame = avcodec_alloc_frame();
  27. if (avctx->width != 720 || avctx->height != 486 && avctx->height != 576) {
  28. av_log(avctx, AV_LOG_ERROR, "Only 720x486 and 720x576 are supported.\n");
  29. return AVERROR(EINVAL);
  30. }
  31. if (!avctx->coded_frame) {
  32. av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
  33. return AVERROR(ENOMEM);
  34. }
  35. return 0;
  36. }
  37. static int avui_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
  38. const AVFrame *pic, int *got_packet)
  39. {
  40. uint8_t *dst, *src = pic->data[0];
  41. int i, j, skip, ret, size, interlaced = pic->interlaced_frame;
  42. if (avctx->height == 486) {
  43. skip = 10;
  44. } else {
  45. skip = 16;
  46. }
  47. size = 2 * avctx->width * (avctx->height + skip) + 8 * interlaced;
  48. if ((ret = ff_alloc_packet2(avctx, pkt, size)) < 0)
  49. return ret;
  50. dst = pkt->data;
  51. if (!(avctx->extradata = av_mallocz(24 + FF_INPUT_BUFFER_PADDING_SIZE)))
  52. return AVERROR(ENOMEM);
  53. avctx->extradata_size = 24;
  54. memcpy(avctx->extradata, "\0\0\0\x18""APRGAPRG0001", 16);
  55. if (interlaced) {
  56. avctx->extradata[19] = 2;
  57. } else {
  58. avctx->extradata[19] = 1;
  59. dst += avctx->width * skip;
  60. }
  61. avctx->coded_frame->reference = 0;
  62. avctx->coded_frame->key_frame = 1;
  63. avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
  64. for (i = 0; i <= interlaced; i++) {
  65. if (interlaced && avctx->height == 486) {
  66. src = pic->data[0] + (1 - i) * pic->linesize[0];
  67. } else {
  68. src = pic->data[0] + i * pic->linesize[0];
  69. }
  70. dst += avctx->width * skip + 4 * i;
  71. for (j = 0; j < avctx->height; j += interlaced + 1) {
  72. memcpy(dst, src, avctx->width * 2);
  73. src += (interlaced + 1) * pic->linesize[0];
  74. dst += avctx->width * 2;
  75. }
  76. }
  77. pkt->flags |= AV_PKT_FLAG_KEY;
  78. *got_packet = 1;
  79. return 0;
  80. }
  81. static av_cold int avui_encode_close(AVCodecContext *avctx)
  82. {
  83. av_freep(&avctx->coded_frame);
  84. return 0;
  85. }
  86. AVCodec ff_avui_encoder = {
  87. .name = "avui",
  88. .type = AVMEDIA_TYPE_VIDEO,
  89. .id = CODEC_ID_AVUI,
  90. .init = avui_encode_init,
  91. .encode2 = avui_encode_frame,
  92. .close = avui_encode_close,
  93. .pix_fmts = (const enum PixelFormat[]){ PIX_FMT_UYVY422, PIX_FMT_NONE },
  94. .long_name = NULL_IF_CONFIG_SMALL("Avid Meridien Uncompressed"),
  95. };