* @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
* @return The best pixel format to convert to or -1 if none was found.
*/
+ attribute_deprecated
enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
int has_alpha, int *loss_ptr);
-enum PixelFormat avcodec_find_best_pix_fmt2(enum PixelFormat *pix_fmt_list,
+ #endif /* FF_API_FIND_BEST_PIX_FMT */
+
+ /**
+ * Find the best pixel format to convert to given a certain source pixel
+ * format. When converting from one pixel format to another, information loss
+ * may occur. For example, when converting from RGB24 to GRAY, the color
+ * information will be lost. Similarly, other losses occur when converting from
+ * some formats to other formats. avcodec_find_best_pix_fmt2() searches which of
+ * the given pixel formats should be used to suffer the least amount of loss.
+ * The pixel formats from which it chooses one, are determined by the
+ * pix_fmt_list parameter.
+ *
+ *
+ * @param[in] pix_fmt_list PIX_FMT_NONE terminated array of pixel formats to choose from
+ * @param[in] src_pix_fmt source pixel format
+ * @param[in] has_alpha Whether the source pixel format alpha channel is used.
+ * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
+ * @return The best pixel format to convert to or -1 if none was found.
+ */
++enum PixelFormat avcodec_find_best_pix_fmt_of_list(enum PixelFormat *pix_fmt_list,
+ enum PixelFormat src_pix_fmt,
+ int has_alpha, int *loss_ptr);
+/**
+ * Find the best pixel format to convert to given a certain source pixel
+ * format and a selection of two destination pixel formats. When converting from
+ * one pixel format to another, information loss may occur. For example, when converting
+ * from RGB24 to GRAY, the color information will be lost. Similarly, other losses occur when
+ * converting from some formats to other formats. avcodec_find_best_pix_fmt2() selects which of
+ * the given pixel formats should be used to suffer the least amount of loss.
+ *
+ * If one of the destination formats is PIX_FMT_NONE the other pixel format (if valid) will be
+ * returned.
+ *
+ * @code
+ * src_pix_fmt = PIX_FMT_YUV420P;
+ * dst_pix_fmt1= PIX_FMT_RGB24;
+ * dst_pix_fmt2= PIX_FMT_GRAY8;
+ * dst_pix_fmt3= PIX_FMT_RGB8;
+ * loss= FF_LOSS_CHROMA; // don't care about chroma loss, so chroma loss will be ignored.
+ * dst_pix_fmt = avcodec_find_best_pix_fmt2(dst_pix_fmt1, dst_pix_fmt2, src_pix_fmt, alpha, &loss);
+ * dst_pix_fmt = avcodec_find_best_pix_fmt2(dst_pix_fmt, dst_pix_fmt3, src_pix_fmt, alpha, &loss);
+ * @endcode
+ *
+ * @param[in] dst_pix_fmt1 One of the two destination pixel formats to choose from
+ * @param[in] dst_pix_fmt2 The other of the two destination pixel formats to choose from
+ * @param[in] src_pix_fmt Source pixel format
+ * @param[in] has_alpha Whether the source pixel format alpha channel is used.
+ * @param[in, out] loss_ptr Combination of loss flags. In: selects which of the losses to ignore, i.e.
+ * NULL or value of zero means we care about all losses. Out: the loss
+ * that occurs when converting from src to selected dst pixel format.
+ * @return The best pixel format to convert to or -1 if none was found.
+ */
+enum PixelFormat avcodec_find_best_pix_fmt2(enum PixelFormat dst_pix_fmt1, enum PixelFormat dst_pix_fmt2,
+ enum PixelFormat src_pix_fmt, int has_alpha, int *loss_ptr);
+
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
/**
static int avg_bits_per_pixel(enum PixelFormat pix_fmt)
{
- int bits;
- const PixFmtInfo *pf;
+ const PixFmtInfo *info = &pix_fmt_info[pix_fmt];
const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
- pf = &pix_fmt_info[pix_fmt];
- switch(pf->pixel_type) {
- case FF_PIXEL_PACKED:
- switch(pix_fmt) {
- case PIX_FMT_YUYV422:
- case PIX_FMT_UYVY422:
- case PIX_FMT_RGB565BE:
- case PIX_FMT_RGB565LE:
- case PIX_FMT_RGB555BE:
- case PIX_FMT_RGB555LE:
- case PIX_FMT_RGB444BE:
- case PIX_FMT_RGB444LE:
- case PIX_FMT_BGR565BE:
- case PIX_FMT_BGR565LE:
- case PIX_FMT_BGR555BE:
- case PIX_FMT_BGR555LE:
- case PIX_FMT_BGR444BE:
- case PIX_FMT_BGR444LE:
- bits = 16;
- break;
- case PIX_FMT_UYYVYY411:
- bits = 12;
- break;
- default:
- bits = pf->depth * pf->nb_channels;
- break;
- }
- break;
- case FF_PIXEL_PLANAR:
- if (desc->log2_chroma_w == 0 && desc->log2_chroma_h == 0) {
- bits = pf->depth * pf->nb_channels;
- } else {
- bits = pf->depth + ((2 * pf->depth) >>
- (desc->log2_chroma_w + desc->log2_chroma_h));
- }
- break;
- case FF_PIXEL_PALETTE:
- bits = 8;
- break;
- default:
- bits = -1;
- break;
- }
- return bits;
-}
-
-static enum PixelFormat avcodec_find_best_pix_fmt1(enum PixelFormat *pix_fmt_list,
- enum PixelFormat src_pix_fmt,
- int has_alpha,
- int loss_mask)
-{
- int dist, i, loss, min_dist;
- enum PixelFormat dst_pix_fmt;
-
- /* find exact color match with smallest size */
- dst_pix_fmt = PIX_FMT_NONE;
- min_dist = 0x7fffffff;
- i = 0;
- while (pix_fmt_list[i] != PIX_FMT_NONE) {
- enum PixelFormat pix_fmt = pix_fmt_list[i];
-
- if (i > PIX_FMT_NB) {
- av_log(NULL, AV_LOG_ERROR, "Pixel format list longer than expected, "
- "it is either not properly terminated or contains duplicates\n");
- return PIX_FMT_NONE;
- }
-
- loss = avcodec_get_pix_fmt_loss(pix_fmt, src_pix_fmt, has_alpha) & loss_mask;
- if (loss == 0) {
- dist = avg_bits_per_pixel(pix_fmt);
- if (dist < min_dist) {
- min_dist = dist;
- dst_pix_fmt = pix_fmt;
- }
- }
- i++;
- }
- return dst_pix_fmt;
+ return info->padded_size ?
+ info->padded_size : av_get_bits_per_pixel(desc);
}
+ #if FF_API_FIND_BEST_PIX_FMT
enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
- int has_alpha, int *loss_ptr)
+ int has_alpha, int *loss_ptr)
{
- enum PixelFormat list[64];
- int i, j = 0;
+ enum PixelFormat dst_pix_fmt;
+ int i;
+
+ if (loss_ptr) /* all losses count (for backward compatibility) */
+ *loss_ptr = 0;
- // test only the first 64 pixel formats to avoid undefined behaviour
- for (i = 0; i < 64; i++) {
+ dst_pix_fmt = PIX_FMT_NONE; /* so first iteration doesn't have to be treated special */
+ for(i = 0; i< FFMIN(PIX_FMT_NB, 64); i++){
if (pix_fmt_mask & (1ULL << i))
- list[j++] = i;
+ dst_pix_fmt = avcodec_find_best_pix_fmt2(dst_pix_fmt, i, src_pix_fmt, has_alpha, loss_ptr);
}
- list[j] = PIX_FMT_NONE;
-
- return avcodec_find_best_pix_fmt2(list, src_pix_fmt, has_alpha, loss_ptr);
+ return dst_pix_fmt;
}
+ #endif /* FF_API_FIND_BEST_PIX_FMT */
-enum PixelFormat avcodec_find_best_pix_fmt2(enum PixelFormat *pix_fmt_list,
- enum PixelFormat src_pix_fmt,
- int has_alpha, int *loss_ptr)
+enum PixelFormat avcodec_find_best_pix_fmt2(enum PixelFormat dst_pix_fmt1, enum PixelFormat dst_pix_fmt2,
+ enum PixelFormat src_pix_fmt, int has_alpha, int *loss_ptr)
{
enum PixelFormat dst_pix_fmt;
- int loss_mask, i;
+ int loss1, loss2, loss_order1, loss_order2, i, loss_mask;
static const int loss_mask_order[] = {
~0, /* no loss first */
~FF_LOSS_ALPHA,
*/
#define LIBAVCODEC_VERSION_MAJOR 54
- #define LIBAVCODEC_VERSION_MINOR 39
- #define LIBAVCODEC_VERSION_MICRO 101
-#define LIBAVCODEC_VERSION_MINOR 21
-#define LIBAVCODEC_VERSION_MICRO 0
++#define LIBAVCODEC_VERSION_MINOR 40
++#define LIBAVCODEC_VERSION_MICRO 100
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
LIBAVCODEC_VERSION_MINOR, \
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