* MLP decoder
* Copyright (c) 2007-2008 Ian Caulfield
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/** number of bits used for VLC lookup - longest Huffman code is 9 */
#define VLC_BITS 9
-
-static const char* sample_message =
- "Please file a bug report following the instructions at "
- "http://libav.org/bugreports.html and include "
- "a sample of this file.";
-
typedef struct SubStream {
- //! Set if a valid restart header has been read. Otherwise the substream cannot be decoded.
+ /// Set if a valid restart header has been read. Otherwise the substream cannot be decoded.
uint8_t restart_seen;
//@{
/** restart header data */
- //! The type of noise to be used in the rematrix stage.
+ /// The type of noise to be used in the rematrix stage.
uint16_t noise_type;
- //! The index of the first channel coded in this substream.
+ /// The index of the first channel coded in this substream.
uint8_t min_channel;
- //! The index of the last channel coded in this substream.
+ /// The index of the last channel coded in this substream.
uint8_t max_channel;
- //! The number of channels input into the rematrix stage.
+ /// The number of channels input into the rematrix stage.
uint8_t max_matrix_channel;
- //! For each channel output by the matrix, the output channel to map it to
+ /// For each channel output by the matrix, the output channel to map it to
uint8_t ch_assign[MAX_CHANNELS];
- //! Channel coding parameters for channels in the substream
+ /// Channel coding parameters for channels in the substream
ChannelParams channel_params[MAX_CHANNELS];
- //! The left shift applied to random noise in 0x31ea substreams.
+ /// The left shift applied to random noise in 0x31ea substreams.
uint8_t noise_shift;
- //! The current seed value for the pseudorandom noise generator(s).
+ /// The current seed value for the pseudorandom noise generator(s).
uint32_t noisegen_seed;
- //! Set if the substream contains extra info to check the size of VLC blocks.
+ /// Set if the substream contains extra info to check the size of VLC blocks.
uint8_t data_check_present;
- //! Bitmask of which parameter sets are conveyed in a decoding parameter block.
+ /// Bitmask of which parameter sets are conveyed in a decoding parameter block.
uint8_t param_presence_flags;
#define PARAM_BLOCKSIZE (1 << 7)
#define PARAM_MATRIX (1 << 6)
//@{
/** matrix data */
- //! Number of matrices to be applied.
+ /// Number of matrices to be applied.
uint8_t num_primitive_matrices;
- //! matrix output channel
+ /// matrix output channel
uint8_t matrix_out_ch[MAX_MATRICES];
- //! Whether the LSBs of the matrix output are encoded in the bitstream.
+ /// Whether the LSBs of the matrix output are encoded in the bitstream.
uint8_t lsb_bypass[MAX_MATRICES];
- //! Matrix coefficients, stored as 2.14 fixed point.
+ /// Matrix coefficients, stored as 2.14 fixed point.
int32_t matrix_coeff[MAX_MATRICES][MAX_CHANNELS];
- //! Left shift to apply to noise values in 0x31eb substreams.
+ /// Left shift to apply to noise values in 0x31eb substreams.
uint8_t matrix_noise_shift[MAX_MATRICES];
//@}
- //! Left shift to apply to Huffman-decoded residuals.
+ /// Left shift to apply to Huffman-decoded residuals.
uint8_t quant_step_size[MAX_CHANNELS];
- //! number of PCM samples in current audio block
+ /// number of PCM samples in current audio block
uint16_t blocksize;
- //! Number of PCM samples decoded so far in this frame.
+ /// Number of PCM samples decoded so far in this frame.
uint16_t blockpos;
- //! Left shift to apply to decoded PCM values to get final 24-bit output.
+ /// Left shift to apply to decoded PCM values to get final 24-bit output.
int8_t output_shift[MAX_CHANNELS];
- //! Running XOR of all output samples.
+ /// Running XOR of all output samples.
int32_t lossless_check_data;
} SubStream;
typedef struct MLPDecodeContext {
AVCodecContext *avctx;
+ AVFrame frame;
- //! Current access unit being read has a major sync.
+ /// Current access unit being read has a major sync.
int is_major_sync_unit;
- //! Set if a valid major sync block has been read. Otherwise no decoding is possible.
+ /// Set if a valid major sync block has been read. Otherwise no decoding is possible.
uint8_t params_valid;
- //! Number of substreams contained within this stream.
+ /// Number of substreams contained within this stream.
uint8_t num_substreams;
- //! Index of the last substream to decode - further substreams are skipped.
+ /// Index of the last substream to decode - further substreams are skipped.
uint8_t max_decoded_substream;
- //! number of PCM samples contained in each frame
+ /// number of PCM samples contained in each frame
int access_unit_size;
- //! next power of two above the number of samples in each frame
+ /// next power of two above the number of samples in each frame
int access_unit_size_pow2;
SubStream substream[MAX_SUBSTREAMS];
VLC_BITS, (9 + VLC_BITS - 1) / VLC_BITS);
if (result < 0)
- return -1;
+ return AVERROR_INVALIDDATA;
if (lsb_bits > 0)
result = (result << lsb_bits) + get_bits(gbp, lsb_bits);
m->avctx = avctx;
for (substr = 0; substr < MAX_SUBSTREAMS; substr++)
m->substream[substr].lossless_check_data = 0xffffffff;
- dsputil_init(&m->dsp, avctx);
+ ff_dsputil_init(&m->dsp, avctx);
+
+ avcodec_get_frame_defaults(&m->frame);
+ avctx->coded_frame = &m->frame;
return 0;
}
static int read_major_sync(MLPDecodeContext *m, GetBitContext *gb)
{
MLPHeaderInfo mh;
- int substr;
+ int substr, ret;
- if (ff_mlp_read_major_sync(m->avctx, &mh, gb) != 0)
- return -1;
+ if ((ret = ff_mlp_read_major_sync(m->avctx, &mh, gb)) != 0)
+ return ret;
if (mh.group1_bits == 0) {
av_log(m->avctx, AV_LOG_ERROR, "invalid/unknown bits per sample\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
if (mh.group2_bits > mh.group1_bits) {
av_log(m->avctx, AV_LOG_ERROR,
"Channel group 2 cannot have more bits per sample than group 1.\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
if (mh.group2_samplerate && mh.group2_samplerate != mh.group1_samplerate) {
av_log(m->avctx, AV_LOG_ERROR,
"Channel groups with differing sample rates are not currently supported.\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
if (mh.group1_samplerate == 0) {
av_log(m->avctx, AV_LOG_ERROR, "invalid/unknown sampling rate\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
if (mh.group1_samplerate > MAX_SAMPLERATE) {
av_log(m->avctx, AV_LOG_ERROR,
"Sampling rate %d is greater than the supported maximum (%d).\n",
mh.group1_samplerate, MAX_SAMPLERATE);
- return -1;
+ return AVERROR_INVALIDDATA;
}
if (mh.access_unit_size > MAX_BLOCKSIZE) {
av_log(m->avctx, AV_LOG_ERROR,
"Block size %d is greater than the supported maximum (%d).\n",
mh.access_unit_size, MAX_BLOCKSIZE);
- return -1;
+ return AVERROR_INVALIDDATA;
}
if (mh.access_unit_size_pow2 > MAX_BLOCKSIZE_POW2) {
av_log(m->avctx, AV_LOG_ERROR,
"Block size pow2 %d is greater than the supported maximum (%d).\n",
mh.access_unit_size_pow2, MAX_BLOCKSIZE_POW2);
- return -1;
+ return AVERROR_INVALIDDATA;
}
if (mh.num_substreams == 0)
- return -1;
+ return AVERROR_INVALIDDATA;
if (m->avctx->codec_id == CODEC_ID_MLP && mh.num_substreams > 2) {
av_log(m->avctx, AV_LOG_ERROR, "MLP only supports up to 2 substreams.\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
if (mh.num_substreams > MAX_SUBSTREAMS) {
- av_log(m->avctx, AV_LOG_ERROR,
+ av_log_ask_for_sample(m->avctx,
"Number of substreams %d is larger than the maximum supported "
- "by the decoder. %s\n", mh.num_substreams, sample_message);
- return -1;
+ "by the decoder.\n", mh.num_substreams);
+ return AVERROR_PATCHWELCOME;
}
m->access_unit_size = mh.access_unit_size;
if (sync_word != 0x31ea >> 1) {
av_log(m->avctx, AV_LOG_ERROR,
"restart header sync incorrect (got 0x%04x)\n", sync_word);
- return -1;
+ return AVERROR_INVALIDDATA;
}
s->noise_type = get_bits1(gbp);
if (m->avctx->codec_id == CODEC_ID_MLP && s->noise_type) {
av_log(m->avctx, AV_LOG_ERROR, "MLP must have 0x31ea sync word.\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
skip_bits(gbp, 16); /* Output timestamp */
av_log(m->avctx, AV_LOG_ERROR,
"Max matrix channel cannot be greater than %d.\n",
max_matrix_channel);
- return -1;
+ return AVERROR_INVALIDDATA;
}
if (s->max_channel != s->max_matrix_channel) {
av_log(m->avctx, AV_LOG_ERROR,
"Max channel must be equal max matrix channel.\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
/* This should happen for TrueHD streams with >6 channels and MLP's noise
* type. It is not yet known if this is allowed. */
if (s->max_channel > MAX_MATRIX_CHANNEL_MLP && !s->noise_type) {
- av_log(m->avctx, AV_LOG_ERROR,
+ av_log_ask_for_sample(m->avctx,
"Number of channels %d is larger than the maximum supported "
- "by the decoder. %s\n", s->max_channel+2, sample_message);
- return -1;
+ "by the decoder.\n", s->max_channel + 2);
+ return AVERROR_PATCHWELCOME;
}
if (s->min_channel > s->max_channel) {
av_log(m->avctx, AV_LOG_ERROR,
"Substream min channel cannot be greater than max channel.\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
if (m->avctx->request_channels > 0
for (ch = 0; ch <= s->max_matrix_channel; ch++) {
int ch_assign = get_bits(gbp, 6);
if (ch_assign > s->max_matrix_channel) {
- av_log(m->avctx, AV_LOG_ERROR,
- "Assignment of matrix channel %d to invalid output channel %d. %s\n",
- ch, ch_assign, sample_message);
- return -1;
+ av_log_ask_for_sample(m->avctx,
+ "Assignment of matrix channel %d to invalid output channel %d.\n",
+ ch, ch_assign);
+ return AVERROR_PATCHWELCOME;
}
s->ch_assign[ch_assign] = ch;
}
if (m->filter_changed[channel][filter]++ > 1) {
av_log(m->avctx, AV_LOG_ERROR, "Filters may change only once per access unit.\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
order = get_bits(gbp, 4);
av_log(m->avctx, AV_LOG_ERROR,
"%cIR filter order %d is greater than maximum %d.\n",
fchar, order, max_order);
- return -1;
+ return AVERROR_INVALIDDATA;
}
fp->order = order;
av_log(m->avctx, AV_LOG_ERROR,
"%cIR filter coeff_bits must be between 1 and 16.\n",
fchar);
- return -1;
+ return AVERROR_INVALIDDATA;
}
if (coeff_bits + coeff_shift > 16) {
av_log(m->avctx, AV_LOG_ERROR,
"Sum of coeff_bits and coeff_shift for %cIR filter must be 16 or less.\n",
fchar);
- return -1;
+ return AVERROR_INVALIDDATA;
}
for (i = 0; i < order; i++)
if (filter == FIR) {
av_log(m->avctx, AV_LOG_ERROR,
"FIR filter has state data specified.\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
state_bits = get_bits(gbp, 4);
if (m->matrix_changed++ > 1) {
av_log(m->avctx, AV_LOG_ERROR, "Matrices may change only once per access unit.\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
s->num_primitive_matrices = get_bits(gbp, 4);
av_log(m->avctx, AV_LOG_ERROR,
"Number of primitive matrices cannot be greater than %d.\n",
max_primitive_matrices);
- return -1;
+ return AVERROR_INVALIDDATA;
}
for (mat = 0; mat < s->num_primitive_matrices; mat++) {
av_log(m->avctx, AV_LOG_ERROR,
"Invalid channel %d specified as output from matrix.\n",
s->matrix_out_ch[mat]);
- return -1;
+ return AVERROR_INVALIDDATA;
}
if (frac_bits > 14) {
av_log(m->avctx, AV_LOG_ERROR,
"Too many fractional bits specified.\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
max_chan = s->max_matrix_channel;
ChannelParams *cp = &s->channel_params[ch];
FilterParams *fir = &cp->filter_params[FIR];
FilterParams *iir = &cp->filter_params[IIR];
+ int ret;
if (s->param_presence_flags & PARAM_FIR)
if (get_bits1(gbp))
- if (read_filter_params(m, gbp, substr, ch, FIR) < 0)
- return -1;
+ if ((ret = read_filter_params(m, gbp, substr, ch, FIR)) < 0)
+ return ret;
if (s->param_presence_flags & PARAM_IIR)
if (get_bits1(gbp))
- if (read_filter_params(m, gbp, substr, ch, IIR) < 0)
- return -1;
+ if ((ret = read_filter_params(m, gbp, substr, ch, IIR)) < 0)
+ return ret;
if (fir->order + iir->order > 8) {
av_log(m->avctx, AV_LOG_ERROR, "Total filter orders too high.\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
if (fir->order && iir->order &&
fir->shift != iir->shift) {
av_log(m->avctx, AV_LOG_ERROR,
"FIR and IIR filters must use the same precision.\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
/* The FIR and IIR filters must have the same precision.
* To simplify the filtering code, only the precision of the
if (cp->huff_lsbs > 24) {
av_log(m->avctx, AV_LOG_ERROR, "Invalid huff_lsbs.\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
cp->sign_huff_offset = calculate_sign_huff(m, substr, ch);
{
SubStream *s = &m->substream[substr];
unsigned int ch;
+ int ret;
if (s->param_presence_flags & PARAM_PRESENCE)
if (get_bits1(gbp))
if (s->blocksize < 8 || s->blocksize > m->access_unit_size) {
av_log(m->avctx, AV_LOG_ERROR, "Invalid blocksize.");
s->blocksize = 0;
- return -1;
+ return AVERROR_INVALIDDATA;
}
}
if (s->param_presence_flags & PARAM_MATRIX)
if (get_bits1(gbp))
- if (read_matrix_params(m, substr, gbp) < 0)
- return -1;
+ if ((ret = read_matrix_params(m, substr, gbp)) < 0)
+ return ret;
if (s->param_presence_flags & PARAM_OUTSHIFT)
if (get_bits1(gbp))
for (ch = s->min_channel; ch <= s->max_channel; ch++)
if (get_bits1(gbp))
- if (read_channel_params(m, substr, gbp, ch) < 0)
- return -1;
+ if ((ret = read_channel_params(m, substr, gbp, ch)) < 0)
+ return ret;
return 0;
}
{
SubStream *s = &m->substream[substr];
unsigned int i, ch, expected_stream_pos = 0;
+ int ret;
if (s->data_check_present) {
expected_stream_pos = get_bits_count(gbp);
expected_stream_pos += get_bits(gbp, 16);
- av_log(m->avctx, AV_LOG_WARNING, "This file contains some features "
- "we have not tested yet. %s\n", sample_message);
+ av_log_ask_for_sample(m->avctx, "This file contains some features "
+ "we have not tested yet.\n");
}
if (s->blockpos + s->blocksize > m->access_unit_size) {
av_log(m->avctx, AV_LOG_ERROR, "too many audio samples in frame\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
memset(&m->bypassed_lsbs[s->blockpos][0], 0,
s->blocksize * sizeof(m->bypassed_lsbs[0]));
for (i = 0; i < s->blocksize; i++)
- if (read_huff_channels(m, gbp, substr, i) < 0)
- return -1;
+ if ((ret = read_huff_channels(m, gbp, substr, i)) < 0)
+ return ret;
for (ch = s->min_channel; ch <= s->max_channel; ch++)
filter_channel(m, substr, ch);
/** Write the audio data into the output buffer. */
-static int output_data_internal(MLPDecodeContext *m, unsigned int substr,
- uint8_t *data, unsigned int *data_size, int is32)
+static int output_data(MLPDecodeContext *m, unsigned int substr,
+ void *data, int *got_frame_ptr)
{
+ AVCodecContext *avctx = m->avctx;
SubStream *s = &m->substream[substr];
unsigned int i, out_ch = 0;
- int32_t *data_32 = (int32_t*) data;
- int16_t *data_16 = (int16_t*) data;
+ int32_t *data_32;
+ int16_t *data_16;
+ int ret;
+ int is32 = (m->avctx->sample_fmt == AV_SAMPLE_FMT_S32);
+
+ if (m->avctx->channels != s->max_matrix_channel + 1) {
+ av_log(m->avctx, AV_LOG_ERROR, "channel count mismatch\n");
+ return AVERROR_INVALIDDATA;
+ }
- if (*data_size < (s->max_channel + 1) * s->blockpos * (is32 ? 4 : 2))
- return -1;
+ /* get output buffer */
+ m->frame.nb_samples = s->blockpos;
+ if ((ret = avctx->get_buffer(avctx, &m->frame)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return ret;
+ }
+ data_32 = (int32_t *)m->frame.data[0];
+ data_16 = (int16_t *)m->frame.data[0];
for (i = 0; i < s->blockpos; i++) {
for (out_ch = 0; out_ch <= s->max_matrix_channel; out_ch++) {
}
}
- *data_size = i * out_ch * (is32 ? 4 : 2);
+ *got_frame_ptr = 1;
+ *(AVFrame *)data = m->frame;
return 0;
}
-static int output_data(MLPDecodeContext *m, unsigned int substr,
- uint8_t *data, unsigned int *data_size)
-{
- if (m->avctx->sample_fmt == AV_SAMPLE_FMT_S32)
- return output_data_internal(m, substr, data, data_size, 1);
- else
- return output_data_internal(m, substr, data, data_size, 0);
-}
-
-
/** Read an access unit from the stream.
* @return negative on error, 0 if not enough data is present in the input stream,
* otherwise the number of bytes consumed. */
-static int read_access_unit(AVCodecContext *avctx, void* data, int *data_size,
- AVPacket *avpkt)
+static int read_access_unit(AVCodecContext *avctx, void* data,
+ int *got_frame_ptr, AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
uint8_t substream_parity_present[MAX_SUBSTREAMS];
uint16_t substream_data_len[MAX_SUBSTREAMS];
uint8_t parity_bits;
+ int ret;
if (buf_size < 4)
return 0;
length = (AV_RB16(buf) & 0xfff) * 2;
if (length < 4 || length > buf_size)
- return -1;
+ return AVERROR_INVALIDDATA;
init_get_bits(&gb, (buf + 4), (length - 4) * 8);
if (!m->params_valid) {
av_log(m->avctx, AV_LOG_WARNING,
"Stream parameters not seen; skipping frame.\n");
- *data_size = 0;
+ *got_frame_ptr = 0;
return length;
}
if (!s->restart_seen)
goto next_substr;
- if (read_block_data(m, &gb, substr) < 0)
- return -1;
+ if ((ret = read_block_data(m, &gb, substr)) < 0)
+ return ret;
if (get_bits_count(&gb) >= substream_data_len[substr] * 8)
goto substream_length_mismatch;
int shorten_by;
if (get_bits(&gb, 16) != 0xD234)
- return -1;
+ return AVERROR_INVALIDDATA;
shorten_by = get_bits(&gb, 16);
if (m->avctx->codec_id == CODEC_ID_TRUEHD && shorten_by & 0x2000)
s->blockpos -= FFMIN(shorten_by & 0x1FFF, s->blockpos);
else if (m->avctx->codec_id == CODEC_ID_MLP && shorten_by != 0xD234)
- return -1;
+ return AVERROR_INVALIDDATA;
if (substr == m->max_decoded_substream)
av_log(m->avctx, AV_LOG_INFO, "End of stream indicated.\n");
rematrix_channels(m, m->max_decoded_substream);
- if (output_data(m, m->max_decoded_substream, data, data_size) < 0)
- return -1;
+ if ((ret = output_data(m, m->max_decoded_substream, data, got_frame_ptr)) < 0)
+ return ret;
return length;
substream_length_mismatch:
av_log(m->avctx, AV_LOG_ERROR, "substream %d length mismatch\n", substr);
- return -1;
+ return AVERROR_INVALIDDATA;
error:
m->params_valid = 0;
- return -1;
+ return AVERROR_INVALIDDATA;
}
AVCodec ff_mlp_decoder = {
- "mlp",
- AVMEDIA_TYPE_AUDIO,
- CODEC_ID_MLP,
- sizeof(MLPDecodeContext),
- mlp_decode_init,
- NULL,
- NULL,
- read_access_unit,
- .long_name = NULL_IF_CONFIG_SMALL("MLP (Meridian Lossless Packing)"),
+ .name = "mlp",
+ .type = AVMEDIA_TYPE_AUDIO,
+ .id = CODEC_ID_MLP,
+ .priv_data_size = sizeof(MLPDecodeContext),
+ .init = mlp_decode_init,
+ .decode = read_access_unit,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("MLP (Meridian Lossless Packing)"),
};
#if CONFIG_TRUEHD_DECODER
AVCodec ff_truehd_decoder = {
- "truehd",
- AVMEDIA_TYPE_AUDIO,
- CODEC_ID_TRUEHD,
- sizeof(MLPDecodeContext),
- mlp_decode_init,
- NULL,
- NULL,
- read_access_unit,
- .long_name = NULL_IF_CONFIG_SMALL("TrueHD"),
+ .name = "truehd",
+ .type = AVMEDIA_TYPE_AUDIO,
+ .id = CODEC_ID_TRUEHD,
+ .priv_data_size = sizeof(MLPDecodeContext),
+ .init = mlp_decode_init,
+ .decode = read_access_unit,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("TrueHD"),
};
#endif /* CONFIG_TRUEHD_DECODER */
projects / ffmpeg / blobdiff