ffmpeg_qsv.c 3.0 KB

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  1. /*
  2. * This file is part of FFmpeg.
  3. *
  4. * FFmpeg is free software; you can redistribute it and/or
  5. * modify it under the terms of the GNU Lesser General Public
  6. * License as published by the Free Software Foundation; either
  7. * version 2.1 of the License, or (at your option) any later version.
  8. *
  9. * FFmpeg is distributed in the hope that it will be useful,
  10. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  12. * Lesser General Public License for more details.
  13. *
  14. * You should have received a copy of the GNU Lesser General Public
  15. * License along with FFmpeg; if not, write to the Free Software
  16. * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17. */
  18. #include <mfx/mfxvideo.h>
  19. #include <stdlib.h>
  20. #include "libavutil/dict.h"
  21. #include "libavutil/hwcontext.h"
  22. #include "libavutil/hwcontext_qsv.h"
  23. #include "libavutil/mem.h"
  24. #include "libavutil/opt.h"
  25. #include "libavcodec/qsv.h"
  26. #include "ffmpeg.h"
  27. static AVBufferRef *hw_device_ctx;
  28. char *qsv_device = NULL;
  29. static int qsv_get_buffer(AVCodecContext *s, AVFrame *frame, int flags)
  30. {
  31. InputStream *ist = s->opaque;
  32. return av_hwframe_get_buffer(ist->hw_frames_ctx, frame, 0);
  33. }
  34. static void qsv_uninit(AVCodecContext *s)
  35. {
  36. InputStream *ist = s->opaque;
  37. av_buffer_unref(&ist->hw_frames_ctx);
  38. }
  39. static int qsv_device_init(InputStream *ist)
  40. {
  41. int err;
  42. AVDictionary *dict = NULL;
  43. if (qsv_device) {
  44. err = av_dict_set(&dict, "child_device", qsv_device, 0);
  45. if (err < 0)
  46. return err;
  47. }
  48. err = av_hwdevice_ctx_create(&hw_device_ctx, AV_HWDEVICE_TYPE_QSV,
  49. ist->hwaccel_device, dict, 0);
  50. if (err < 0) {
  51. av_log(NULL, AV_LOG_ERROR, "Error creating a QSV device\n");
  52. goto err_out;
  53. }
  54. err_out:
  55. if (dict)
  56. av_dict_free(&dict);
  57. return err;
  58. }
  59. int qsv_init(AVCodecContext *s)
  60. {
  61. InputStream *ist = s->opaque;
  62. AVHWFramesContext *frames_ctx;
  63. AVQSVFramesContext *frames_hwctx;
  64. int ret;
  65. if (!hw_device_ctx) {
  66. ret = qsv_device_init(ist);
  67. if (ret < 0)
  68. return ret;
  69. }
  70. av_buffer_unref(&ist->hw_frames_ctx);
  71. ist->hw_frames_ctx = av_hwframe_ctx_alloc(hw_device_ctx);
  72. if (!ist->hw_frames_ctx)
  73. return AVERROR(ENOMEM);
  74. frames_ctx = (AVHWFramesContext*)ist->hw_frames_ctx->data;
  75. frames_hwctx = frames_ctx->hwctx;
  76. frames_ctx->width = FFALIGN(s->coded_width, 32);
  77. frames_ctx->height = FFALIGN(s->coded_height, 32);
  78. frames_ctx->format = AV_PIX_FMT_QSV;
  79. frames_ctx->sw_format = s->sw_pix_fmt;
  80. frames_ctx->initial_pool_size = 64 + s->extra_hw_frames;
  81. frames_hwctx->frame_type = MFX_MEMTYPE_VIDEO_MEMORY_DECODER_TARGET;
  82. ret = av_hwframe_ctx_init(ist->hw_frames_ctx);
  83. if (ret < 0) {
  84. av_log(NULL, AV_LOG_ERROR, "Error initializing a QSV frame pool\n");
  85. return ret;
  86. }
  87. ist->hwaccel_get_buffer = qsv_get_buffer;
  88. ist->hwaccel_uninit = qsv_uninit;
  89. return 0;
  90. }