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https://github.com/mpv-player/mpv
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9127939071
Now it's sourced from the etc/ PNG files directly, instead of preprocessing them with imagemagick. Add some ad-hoc code to decode PNG files with libavcodec. At least we can drop the zlib code in exchange.
49 lines
1.2 KiB
C
49 lines
1.2 KiB
C
#include <libavcodec/avcodec.h>
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#include "common/common.h"
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#include "mp_image.h"
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#include "image_writer.h"
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#include "image_loader.h"
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struct mp_image *load_image_png_buf(void *buffer, size_t buffer_size, int imgfmt)
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{
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const AVCodec *codec = avcodec_find_decoder(AV_CODEC_ID_PNG);
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if (!codec)
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return NULL;
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AVCodecContext *avctx = avcodec_alloc_context3(codec);
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if (!avctx)
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return NULL;
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if (avcodec_open2(avctx, codec, NULL) < 0) {
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avcodec_free_context(&avctx);
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return NULL;
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}
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AVPacket *pkt = av_packet_alloc();
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if (pkt) {
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if (av_new_packet(pkt, buffer_size) >= 0)
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memcpy(pkt->data, buffer, buffer_size);
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}
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// (There is only 1 outcome: either it takes it and decodes it, or not.)
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avcodec_send_packet(avctx, pkt);
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avcodec_send_packet(avctx, NULL);
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av_packet_free(&pkt);
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struct mp_image *res = NULL;
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AVFrame *frame = av_frame_alloc();
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if (frame && avcodec_receive_frame(avctx, frame) >= 0) {
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struct mp_image *r = mp_image_from_av_frame(frame);
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if (r)
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res = convert_image(r, imgfmt, mp_null_log);
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talloc_free(r);
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}
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av_frame_free(&frame);
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avcodec_free_context(&avctx);
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return res;
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}
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