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@ -86,7 +86,7 @@ static int a64_write_packet(struct AVFormatContext *s, AVPacket *pkt) |
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* the data for colram from/to ram first and waste too much time. If we interleave and send the |
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* charset beforehand, we assemble a new charset chunk by chunk, write current screen data to |
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* screen-ram to be displayed and decode the colram directly to colram-location $d800 during |
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* the overscan, while reading directly from source |
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* the overscan, while reading directly from source. |
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* This is the only way so far, to achieve 25fps on c64 */ |
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if(avctx->extradata) { |
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/* fetch values from extradata */ |
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@ -96,33 +96,35 @@ static int a64_write_packet(struct AVFormatContext *s, AVPacket *pkt) |
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frame_size = AV_RB32(avctx->extradata + 12); |
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/* TODO: sanity checks? */ |
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} |
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else { |
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} else { |
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av_log(avctx, AV_LOG_ERROR, "extradata not set\n"); |
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return AVERROR(EINVAL); |
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} |
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ch_chunksize=charset_size/lifetime; |
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/* TODO: check if charset/size is % lifetime, but maybe check in codec */ |
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if(pkt->data) num_frames = lifetime; |
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else num_frames = c->prev_frame_count; |
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for(i = 0; i < num_frames; i++) { |
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if(pkt->data) { |
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/* if available, put newest charset chunk into buffer */ |
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put_buffer(s->pb, pkt->data + ch_chunksize * i, ch_chunksize); |
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} |
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else { |
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} else { |
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/* a bit ugly, but is there an alternative to put many zeros? */ |
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for(j = 0; j < ch_chunksize; j++) put_byte(s->pb, 0); |
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} |
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if(c->prev_pkt.data) { |
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/* put frame (screen + colram) from last packet into buffer */ |
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put_buffer(s->pb, c->prev_pkt.data + charset_size + frame_size * i, frame_size); |
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} |
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else { |
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} else { |
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/* a bit ugly, but is there an alternative to put many zeros? */ |
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for(j = 0; j < frame_size; j++) put_byte(s->pb, 0); |
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} |
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} |
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/* backup current packet for next turn */ |
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if(pkt->data) { |
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/* no backup packet yet? create one! */ |
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@ -136,6 +138,7 @@ static int a64_write_packet(struct AVFormatContext *s, AVPacket *pkt) |
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return AVERROR(ENOMEM); |
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} |
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} |
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c->prev_frame_count = frame_count; |
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break; |
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} |
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