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@ -29,6 +29,7 @@ |
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#include "libavutil/frame.h" |
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#include "libavutil/frame.h" |
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#include "libavutil/hwcontext.h" |
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#include "libavutil/hwcontext.h" |
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#include "libavutil/imgutils.h" |
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#include "libavutil/imgutils.h" |
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#include "libavutil/intmath.h" |
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#include "avcodec.h" |
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#include "avcodec.h" |
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#include "bytestream.h" |
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#include "bytestream.h" |
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@ -450,6 +451,111 @@ int attribute_align_arg avcodec_send_packet(AVCodecContext *avctx, const AVPacke |
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return 0; |
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return 0; |
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} |
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} |
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static int calc_cropping_offsets(size_t offsets[4], const AVFrame *frame, |
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const AVPixFmtDescriptor *desc) |
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{ |
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int i, j; |
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for (i = 0; frame->data[i]; i++) { |
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const AVComponentDescriptor *comp = NULL; |
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int shift_x = (i == 1 || i == 2) ? desc->log2_chroma_w : 0; |
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int shift_y = (i == 1 || i == 2) ? desc->log2_chroma_h : 0; |
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if (desc->flags & (AV_PIX_FMT_FLAG_PAL | AV_PIX_FMT_FLAG_PSEUDOPAL) && i == 1) { |
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offsets[i] = 0; |
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break; |
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} |
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/* find any component descriptor for this plane */ |
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for (j = 0; j < desc->nb_components; j++) { |
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if (desc->comp[j].plane == i) { |
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comp = &desc->comp[j]; |
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break; |
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} |
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} |
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if (!comp) |
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return AVERROR_BUG; |
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offsets[i] = (frame->crop_top >> shift_y) * frame->linesize[i] + |
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(frame->crop_left >> shift_x) * comp->step; |
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} |
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return 0; |
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} |
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static int apply_cropping(AVCodecContext *avctx, AVFrame *frame) |
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{ |
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const AVPixFmtDescriptor *desc; |
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size_t offsets[4]; |
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int i; |
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/* make sure we are noisy about decoders returning invalid cropping data */ |
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if (frame->crop_left >= INT_MAX - frame->crop_right || |
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frame->crop_top >= INT_MAX - frame->crop_bottom || |
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(frame->crop_left + frame->crop_right) >= frame->width || |
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(frame->crop_top + frame->crop_bottom) >= frame->height) { |
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av_log(avctx, AV_LOG_WARNING, |
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"Invalid cropping information set by a decoder: %zu/%zu/%zu/%zu " |
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"(frame size %dx%d). This is a bug, please report it\n", |
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frame->crop_left, frame->crop_right, frame->crop_top, frame->crop_bottom, |
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frame->width, frame->height); |
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frame->crop_left = 0; |
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frame->crop_right = 0; |
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frame->crop_top = 0; |
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frame->crop_bottom = 0; |
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return 0; |
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} |
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if (!avctx->apply_cropping) |
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return 0; |
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desc = av_pix_fmt_desc_get(frame->format); |
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if (!desc) |
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return AVERROR_BUG; |
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/* Apply just the right/bottom cropping for hwaccel formats. Bitstream
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* formats cannot be easily handled here either (and corresponding decoders |
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* should not export any cropping anyway), so do the same for those as well. |
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* */ |
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if (desc->flags & (AV_PIX_FMT_FLAG_BITSTREAM | AV_PIX_FMT_FLAG_HWACCEL)) { |
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frame->width -= frame->crop_right; |
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frame->height -= frame->crop_bottom; |
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frame->crop_right = 0; |
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frame->crop_bottom = 0; |
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return 0; |
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} |
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/* calculate the offsets for each plane */ |
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calc_cropping_offsets(offsets, frame, desc); |
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/* adjust the offsets to avoid breaking alignment */ |
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if (!(avctx->flags & AV_CODEC_FLAG_UNALIGNED)) { |
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int min_log2_align = INT_MAX; |
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for (i = 0; frame->data[i]; i++) { |
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int log2_align = offsets[i] ? av_ctz(offsets[i]) : INT_MAX; |
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min_log2_align = FFMIN(log2_align, min_log2_align); |
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} |
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if (min_log2_align < 5) { |
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frame->crop_left &= ~((1 << min_log2_align) - 1); |
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calc_cropping_offsets(offsets, frame, desc); |
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} |
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} |
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for (i = 0; frame->data[i]; i++) |
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frame->data[i] += offsets[i]; |
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frame->width -= (frame->crop_left + frame->crop_right); |
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frame->height -= (frame->crop_top + frame->crop_bottom); |
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frame->crop_left = 0; |
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frame->crop_right = 0; |
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frame->crop_top = 0; |
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frame->crop_bottom = 0; |
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return 0; |
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} |
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int attribute_align_arg avcodec_receive_frame(AVCodecContext *avctx, AVFrame *frame) |
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int attribute_align_arg avcodec_receive_frame(AVCodecContext *avctx, AVFrame *frame) |
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{ |
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{ |
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AVCodecInternal *avci = avctx->internal; |
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AVCodecInternal *avci = avctx->internal; |
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@ -472,6 +578,14 @@ int attribute_align_arg avcodec_receive_frame(AVCodecContext *avctx, AVFrame *fr |
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return ret; |
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return ret; |
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} |
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} |
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if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) { |
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ret = apply_cropping(avctx, frame); |
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if (ret < 0) { |
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av_frame_unref(frame); |
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return ret; |
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} |
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} |
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avctx->frame_number++; |
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avctx->frame_number++; |
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return 0; |
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return 0; |
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@ -1029,7 +1143,8 @@ int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags) |
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ret = avctx->get_buffer2(avctx, frame, flags); |
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ret = avctx->get_buffer2(avctx, frame, flags); |
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end: |
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end: |
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if (avctx->codec_type == AVMEDIA_TYPE_VIDEO && !override_dimensions) { |
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if (avctx->codec_type == AVMEDIA_TYPE_VIDEO && !override_dimensions && |
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!(avctx->codec->caps_internal & FF_CODEC_CAP_EXPORTS_CROPPING)) { |
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frame->width = avctx->width; |
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frame->width = avctx->width; |
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frame->height = avctx->height; |
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frame->height = avctx->height; |
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} |
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} |
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