lswsutils.c 2.0 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 "libavutil/imgutils.h"
  19. #include "lswsutils.h"
  20. int ff_scale_image(uint8_t *dst_data[4], int dst_linesize[4],
  21. int dst_w, int dst_h, enum AVPixelFormat dst_pix_fmt,
  22. uint8_t * const src_data[4], int src_linesize[4],
  23. int src_w, int src_h, enum AVPixelFormat src_pix_fmt,
  24. void *log_ctx)
  25. {
  26. int ret;
  27. struct SwsContext *sws_ctx = sws_getContext(src_w, src_h, src_pix_fmt,
  28. dst_w, dst_h, dst_pix_fmt,
  29. 0, NULL, NULL, NULL);
  30. if (!sws_ctx) {
  31. av_log(log_ctx, AV_LOG_ERROR,
  32. "Impossible to create scale context for the conversion "
  33. "fmt:%s s:%dx%d -> fmt:%s s:%dx%d\n",
  34. av_get_pix_fmt_name(src_pix_fmt), src_w, src_h,
  35. av_get_pix_fmt_name(dst_pix_fmt), dst_w, dst_h);
  36. ret = AVERROR(EINVAL);
  37. goto end;
  38. }
  39. if ((ret = av_image_alloc(dst_data, dst_linesize, dst_w, dst_h, dst_pix_fmt, 16)) < 0)
  40. goto end;
  41. ret = 0;
  42. sws_scale(sws_ctx, (const uint8_t * const*)src_data, src_linesize, 0, src_h, dst_data, dst_linesize);
  43. end:
  44. sws_freeContext(sws_ctx);
  45. return ret;
  46. }