Function libwebp_anim_encode_frame

libavcodec/libwebpenc_animencoder.c:66–150

}

static int libwebp_anim_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
                                     const AVFrame *frame, int *got_packet) {
    LibWebPAnimContext *s = avctx->priv_data;
    int ret;

    if (!frame) {
        if (s->done) {  // Second flush: return empty package to denote finish.
            *got_packet = 0;
            return 0;
        } else {  // First flush: assemble bitstream and return it.
            WebPData assembled_data = { 0 };
            ret = WebPAnimEncoderAssemble(s->enc, &assembled_data);
            if (ret) {
                ret = ff_get_encode_buffer(avctx, pkt, assembled_data.size, 0);
                if (ret < 0) {
                    WebPDataClear(&assembled_data);
                    return ret;
                }
                memcpy(pkt->data, assembled_data.bytes, assembled_data.size);
                WebPDataClear(&assembled_data);
                s->done = 1;
                pkt->pts = s->first_frame_pts;

                if (pkt->pts != AV_NOPTS_VALUE && s->end_pts > pkt->pts)
                    pkt->duration = s->end_pts - pkt->pts;

                if (avctx->flags & AV_CODEC_FLAG_COPY_OPAQUE) {
                    pkt->opaque               = s->first_frame_opaque;
                    pkt->opaque_ref           = s->first_frame_opaque_ref;
                    s->first_frame_opaque_ref = NULL;
                }

                *got_packet = 1;
                return 0;
            } else {
                WebPDataClear(&assembled_data);
                av_log(s, AV_LOG_ERROR,
                       "WebPAnimEncoderAssemble() failed with error: %d\n",
                       VP8_ENC_ERROR_OUT_OF_MEMORY);
                return AVERROR(ENOMEM);
            }
        }
    } else {
        int timestamp_ms;
        WebPPicture *pic = NULL;
        AVFrame *alt_frame = NULL;
        ret = ff_libwebp_get_frame(avctx, &s->cc, frame, &alt_frame, &pic);
        if (ret < 0)
            goto end;

        timestamp_ms =
            avctx->time_base.num * frame->pts * 1000 / avctx->time_base.den;
        ret = WebPAnimEncoderAdd(s->enc, pic, timestamp_ms, &s->cc.config);
        if (!ret) {
                av_log(avctx, AV_LOG_ERROR,
                       "Encoding WebP frame failed with error: %d\n",
                   pic->error_code);
            ret = ff_libwebp_error_to_averror(pic->error_code);