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author | Michael Niedermayer <michaelni@gmx.at> | 2012-10-23 12:41:02 +0200 |
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committer | Michael Niedermayer <michaelni@gmx.at> | 2012-10-23 12:41:08 +0200 |
commit | 8748472f399604e41fc86bf66526f467b6ad6a23 (patch) | |
tree | dbf9e79f3542d9a080bc4ee5a48e08d8d401e0bc /libavcodec/atrac3.c | |
parent | dcb0d1193a3de3711bdb410c1fe3f70cc5143603 (diff) | |
parent | a2664c91fba15a1307f676ffad511f8f86fb3a27 (diff) | |
download | ffmpeg-streaming-8748472f399604e41fc86bf66526f467b6ad6a23.zip ffmpeg-streaming-8748472f399604e41fc86bf66526f467b6ad6a23.tar.gz |
Merge commit 'a2664c91fba15a1307f676ffad511f8f86fb3a27'
* commit 'a2664c91fba15a1307f676ffad511f8f86fb3a27':
atrac3: move the 'samples_per_frame' field from ATRAC3Context to where it is used
atrac3: remove unused ATRAC3Context field, samples_per_channel
atrac3: use AVCodecContext.block_align instead of keeping a private copy
atrac3: move the 'delay' field from ATRAC3Context to where it is used
atrac3: move the 'version' field from ATRAC3Context to where it is used
Merged-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/atrac3.c')
-rw-r--r-- | libavcodec/atrac3.c | 64 |
1 files changed, 28 insertions, 36 deletions
diff --git a/libavcodec/atrac3.c b/libavcodec/atrac3.c index 28994a8..4dda39a 100644 --- a/libavcodec/atrac3.c +++ b/libavcodec/atrac3.c @@ -93,11 +93,7 @@ typedef struct ATRAC3Context { int coding_mode; int bit_rate; int sample_rate; - int samples_per_channel; - int samples_per_frame; - int bits_per_frame; - int bytes_per_frame; ChannelUnit *units; //@} //@{ @@ -114,8 +110,6 @@ typedef struct ATRAC3Context { //@} //@{ /** extradata */ - int version; - int delay; int scrambled_stream; int frame_factor; //@} @@ -726,7 +720,7 @@ static int decode_frame(AVCodecContext *avctx, const uint8_t *databuf, if (q->coding_mode == JOINT_STEREO) { /* channel coupling mode */ /* decode Sound Unit 1 */ - init_get_bits(&q->gb,databuf,q->bits_per_frame); + init_get_bits(&q->gb, databuf, avctx->block_align * 8); ret = decode_channel_sound_unit(q, &q->gb, q->units, out_samples[0], 0, JOINT_STEREO); @@ -736,26 +730,26 @@ static int decode_frame(AVCodecContext *avctx, const uint8_t *databuf, /* Framedata of the su2 in the joint-stereo mode is encoded in * reverse byte order so we need to swap it first. */ if (databuf == q->decoded_bytes_buffer) { - uint8_t *ptr2 = q->decoded_bytes_buffer + q->bytes_per_frame - 1; + uint8_t *ptr2 = q->decoded_bytes_buffer + avctx->block_align - 1; ptr1 = q->decoded_bytes_buffer; - for (i = 0; i < q->bytes_per_frame / 2; i++, ptr1++, ptr2--) + for (i = 0; i < avctx->block_align / 2; i++, ptr1++, ptr2--) FFSWAP(uint8_t, *ptr1, *ptr2); } else { - const uint8_t *ptr2 = databuf + q->bytes_per_frame - 1; - for (i = 0; i < q->bytes_per_frame; i++) + const uint8_t *ptr2 = databuf + avctx->block_align - 1; + for (i = 0; i < avctx->block_align; i++) q->decoded_bytes_buffer[i] = *ptr2--; } /* Skip the sync codes (0xF8). */ ptr1 = q->decoded_bytes_buffer; for (i = 4; *ptr1 == 0xF8; i++, ptr1++) { - if (i >= q->bytes_per_frame) + if (i >= avctx->block_align) return AVERROR_INVALIDDATA; } /* set the bitstream reader at the start of the second Sound Unit*/ - init_get_bits(&q->gb, ptr1, q->bits_per_frame); + init_get_bits(&q->gb, ptr1, avctx->block_align * 8); /* Fill the Weighting coeffs delay buffer */ memmove(q->weighting_delay, &q->weighting_delay[2], 4 * sizeof(int)); @@ -786,8 +780,8 @@ static int decode_frame(AVCodecContext *avctx, const uint8_t *databuf, for (i = 0; i < avctx->channels; i++) { /* Set the bitstream reader at the start of a channel sound unit. */ init_get_bits(&q->gb, - databuf + i * q->bytes_per_frame / avctx->channels, - q->bits_per_frame / avctx->channels); + databuf + i * avctx->block_align / avctx->channels, + avctx->block_align * 8 / avctx->channels); ret = decode_channel_sound_unit(q, &q->gb, &q->units[i], out_samples[i], i, q->coding_mode); @@ -855,6 +849,7 @@ static int atrac3_decode_frame(AVCodecContext *avctx, void *data, static av_cold int atrac3_decode_init(AVCodecContext *avctx) { int i, ret; + int version, delay, samples_per_frame; const uint8_t *edata_ptr = avctx->extradata; ATRAC3Context *q = avctx->priv_data; static VLC_TYPE atrac3_vlc_table[4096][2]; @@ -863,8 +858,6 @@ static av_cold int atrac3_decode_init(AVCodecContext *avctx) /* Take data from the AVCodecContext (RM container). */ q->sample_rate = avctx->sample_rate; q->bit_rate = avctx->bit_rate; - q->bits_per_frame = avctx->block_align * 8; - q->bytes_per_frame = avctx->block_align; if (avctx->channels <= 0 || avctx->channels > 2) { av_log(avctx, AV_LOG_ERROR, "Channel configuration error!\n"); @@ -876,7 +869,7 @@ static av_cold int atrac3_decode_init(AVCodecContext *avctx) /* Parse the extradata, WAV format */ av_log(avctx, AV_LOG_DEBUG, "[0-1] %d\n", bytestream_get_le16(&edata_ptr)); // Unknown value always 1 - q->samples_per_channel = bytestream_get_le32(&edata_ptr); + edata_ptr += 4; // samples per channel q->coding_mode = bytestream_get_le16(&edata_ptr); av_log(avctx, AV_LOG_DEBUG,"[8-9] %d\n", bytestream_get_le16(&edata_ptr)); //Dupe of coding mode @@ -885,27 +878,26 @@ static av_cold int atrac3_decode_init(AVCodecContext *avctx) bytestream_get_le16(&edata_ptr)); // Unknown always 0 /* setup */ - q->samples_per_frame = SAMPLES_PER_FRAME * avctx->channels; - q->version = 4; - q->delay = 0x88E; + samples_per_frame = SAMPLES_PER_FRAME * avctx->channels; + version = 4; + delay = 0x88E; q->coding_mode = q->coding_mode ? JOINT_STEREO : STEREO; q->scrambled_stream = 0; - if (q->bytes_per_frame != 96 * avctx->channels * q->frame_factor && - q->bytes_per_frame != 152 * avctx->channels * q->frame_factor && - q->bytes_per_frame != 192 * avctx->channels * q->frame_factor) { + if (avctx->block_align != 96 * avctx->channels * q->frame_factor && + avctx->block_align != 152 * avctx->channels * q->frame_factor && + avctx->block_align != 192 * avctx->channels * q->frame_factor) { av_log(avctx, AV_LOG_ERROR, "Unknown frame/channel/frame_factor " - "configuration %d/%d/%d\n", q->bytes_per_frame, + "configuration %d/%d/%d\n", avctx->block_align, avctx->channels, q->frame_factor); return AVERROR_INVALIDDATA; } } else if (avctx->extradata_size == 10) { /* Parse the extradata, RM format. */ - q->version = bytestream_get_be32(&edata_ptr); - q->samples_per_frame = bytestream_get_be16(&edata_ptr); - q->delay = bytestream_get_be16(&edata_ptr); + version = bytestream_get_be32(&edata_ptr); + samples_per_frame = bytestream_get_be16(&edata_ptr); + delay = bytestream_get_be16(&edata_ptr); q->coding_mode = bytestream_get_be16(&edata_ptr); - q->samples_per_channel = q->samples_per_frame / avctx->channels; q->scrambled_stream = 1; } else { @@ -915,21 +907,21 @@ static av_cold int atrac3_decode_init(AVCodecContext *avctx) /* Check the extradata */ - if (q->version != 4) { - av_log(avctx, AV_LOG_ERROR, "Version %d != 4.\n", q->version); + if (version != 4) { + av_log(avctx, AV_LOG_ERROR, "Version %d != 4.\n", version); return AVERROR_INVALIDDATA; } - if (q->samples_per_frame != SAMPLES_PER_FRAME && - q->samples_per_frame != SAMPLES_PER_FRAME * 2) { + if (samples_per_frame != SAMPLES_PER_FRAME && + samples_per_frame != SAMPLES_PER_FRAME * 2) { av_log(avctx, AV_LOG_ERROR, "Unknown amount of samples per frame %d.\n", - q->samples_per_frame); + samples_per_frame); return AVERROR_INVALIDDATA; } - if (q->delay != 0x88E) { + if (delay != 0x88E) { av_log(avctx, AV_LOG_ERROR, "Unknown amount of delay %x != 0x88E.\n", - q->delay); + delay); return AVERROR_INVALIDDATA; } |