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Simplify error handling by processing header errors separate from CRC and
buffer size vs. frame size errors. Originally committed as revision 21519 to svn://svn.ffmpeg.org/ffmpeg/trunk
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@ -1236,21 +1236,7 @@ static int ac3_decode_frame(AVCodecContext * avctx, void *data, int *data_size,
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*data_size = 0;
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err = parse_frame_header(s);
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/* check that reported frame size fits in input buffer */
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if(!err && s->frame_size > buf_size) {
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av_log(avctx, AV_LOG_ERROR, "incomplete frame\n");
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err = AAC_AC3_PARSE_ERROR_FRAME_SIZE;
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}
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/* check for crc mismatch */
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if(err != AAC_AC3_PARSE_ERROR_FRAME_SIZE && avctx->error_recognition >= FF_ER_CAREFUL) {
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if(av_crc(av_crc_get_table(AV_CRC_16_ANSI), 0, &buf[2], s->frame_size-2)) {
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av_log(avctx, AV_LOG_ERROR, "frame CRC mismatch\n");
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err = AAC_AC3_PARSE_ERROR_CRC;
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}
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}
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if(err && err != AAC_AC3_PARSE_ERROR_CRC) {
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if (err) {
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switch(err) {
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case AAC_AC3_PARSE_ERROR_SYNC:
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av_log(avctx, AV_LOG_ERROR, "frame sync error\n");
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@ -1278,6 +1264,18 @@ static int ac3_decode_frame(AVCodecContext * avctx, void *data, int *data_size,
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av_log(avctx, AV_LOG_ERROR, "invalid header\n");
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break;
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}
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} else {
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/* check that reported frame size fits in input buffer */
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if (s->frame_size > buf_size) {
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av_log(avctx, AV_LOG_ERROR, "incomplete frame\n");
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err = AAC_AC3_PARSE_ERROR_FRAME_SIZE;
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} else if (avctx->error_recognition >= FF_ER_CAREFUL) {
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/* check for crc mismatch */
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if (av_crc(av_crc_get_table(AV_CRC_16_ANSI), 0, &buf[2], s->frame_size-2)) {
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av_log(avctx, AV_LOG_ERROR, "frame CRC mismatch\n");
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err = AAC_AC3_PARSE_ERROR_CRC;
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}
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}
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}
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/* if frame is ok, set audio parameters */
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