[FFmpeg-cvslog] mlp: Convert to the new bitstream reader
Alexandra Hájková
git at videolan.org
Wed May 3 13:26:39 EEST 2017
ffmpeg | branch: master | Alexandra Hájková <alexandra at khirnov.net> | Sun Apr 10 20:47:11 2016 +0200| [00c72a1e01a904cf914cd219f0db9457cb321d40] | committer: Diego Biurrun
mlp: Convert to the new bitstream reader
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=00c72a1e01a904cf914cd219f0db9457cb321d40
---
libavcodec/mlp_parser.c | 63 +++++++--------
libavcodec/mlp_parser.h | 4 +-
libavcodec/mlpdec.c | 201 ++++++++++++++++++++++++------------------------
3 files changed, 136 insertions(+), 132 deletions(-)
diff --git a/libavcodec/mlp_parser.c b/libavcodec/mlp_parser.c
index e8fb4f5f4d..45764e83f2 100644
--- a/libavcodec/mlp_parser.c
+++ b/libavcodec/mlp_parser.c
@@ -29,7 +29,8 @@
#include "libavutil/channel_layout.h"
#include "libavutil/crc.h"
#include "libavutil/internal.h"
-#include "get_bits.h"
+
+#include "bitstream.h"
#include "parser.h"
#include "mlp_parser.h"
#include "mlp.h"
@@ -139,67 +140,67 @@ static int ff_mlp_get_major_sync_size(const uint8_t * buf, int bufsize)
/** Read a major sync info header - contains high level information about
* the stream - sample rate, channel arrangement etc. Most of this
* information is not actually necessary for decoding, only for playback.
- * gb must be a freshly initialized GetBitContext with no bits read.
+ * bc must be a freshly-initialized BitstreamContext with no bits read.
*/
-int ff_mlp_read_major_sync(void *log, MLPHeaderInfo *mh, GetBitContext *gb)
+int ff_mlp_read_major_sync(void *log, MLPHeaderInfo *mh, BitstreamContext *bc)
{
int ratebits, channel_arrangement, header_size;
uint16_t checksum;
- assert(get_bits_count(gb) == 0);
+ assert(bitstream_tell(bc) == 0);
- header_size = ff_mlp_get_major_sync_size(gb->buffer, gb->size_in_bits >> 3);
- if (header_size < 0 || gb->size_in_bits < header_size << 3) {
+ header_size = ff_mlp_get_major_sync_size(bc->buffer, bc->size_in_bits >> 3);
+ if (header_size < 0 || bc->size_in_bits < header_size << 3) {
av_log(log, AV_LOG_ERROR, "packet too short, unable to read major sync\n");
return -1;
}
- checksum = ff_mlp_checksum16(gb->buffer, header_size - 2);
- if (checksum != AV_RL16(gb->buffer+header_size-2)) {
+ checksum = ff_mlp_checksum16(bc->buffer, header_size - 2);
+ if (checksum != AV_RL16(bc->buffer + header_size - 2)) {
av_log(log, AV_LOG_ERROR, "major sync info header checksum error\n");
return AVERROR_INVALIDDATA;
}
- if (get_bits_long(gb, 24) != 0xf8726f) /* Sync words */
+ if (bitstream_read(bc, 24) != 0xf8726f) /* Sync words */
return AVERROR_INVALIDDATA;
- mh->stream_type = get_bits(gb, 8);
+ mh->stream_type = bitstream_read(bc, 8);
mh->header_size = header_size;
if (mh->stream_type == 0xbb) {
- mh->group1_bits = mlp_quants[get_bits(gb, 4)];
- mh->group2_bits = mlp_quants[get_bits(gb, 4)];
+ mh->group1_bits = mlp_quants[bitstream_read(bc, 4)];
+ mh->group2_bits = mlp_quants[bitstream_read(bc, 4)];
- ratebits = get_bits(gb, 4);
+ ratebits = bitstream_read(bc, 4);
mh->group1_samplerate = mlp_samplerate(ratebits);
- mh->group2_samplerate = mlp_samplerate(get_bits(gb, 4));
+ mh->group2_samplerate = mlp_samplerate(bitstream_read(bc, 4));
- skip_bits(gb, 11);
+ bitstream_skip(bc, 11);
- channel_arrangement = get_bits(gb, 5);
+ channel_arrangement = bitstream_read(bc, 5);
mh->channels_mlp = mlp_channels[channel_arrangement];
mh->channel_layout_mlp = mlp_layout[channel_arrangement];
} else if (mh->stream_type == 0xba) {
mh->group1_bits = 24; // TODO: Is this information actually conveyed anywhere?
mh->group2_bits = 0;
- ratebits = get_bits(gb, 4);
+ ratebits = bitstream_read(bc, 4);
mh->group1_samplerate = mlp_samplerate(ratebits);
mh->group2_samplerate = 0;
- skip_bits(gb, 4);
+ bitstream_skip(bc, 4);
- mh->channel_modifier_thd_stream0 = get_bits(gb, 2);
- mh->channel_modifier_thd_stream1 = get_bits(gb, 2);
+ mh->channel_modifier_thd_stream0 = bitstream_read(bc, 2);
+ mh->channel_modifier_thd_stream1 = bitstream_read(bc, 2);
- channel_arrangement = get_bits(gb, 5);
+ channel_arrangement = bitstream_read(bc, 5);
mh->channels_thd_stream1 = truehd_channels(channel_arrangement);
mh->channel_layout_thd_stream1 = truehd_layout(channel_arrangement);
- mh->channel_modifier_thd_stream2 = get_bits(gb, 2);
+ mh->channel_modifier_thd_stream2 = bitstream_read(bc, 2);
- channel_arrangement = get_bits(gb, 13);
+ channel_arrangement = bitstream_read(bc, 13);
mh->channels_thd_stream2 = truehd_channels(channel_arrangement);
mh->channel_layout_thd_stream2 = truehd_layout(channel_arrangement);
} else
@@ -208,15 +209,15 @@ int ff_mlp_read_major_sync(void *log, MLPHeaderInfo *mh, GetBitContext *gb)
mh->access_unit_size = 40 << (ratebits & 7);
mh->access_unit_size_pow2 = 64 << (ratebits & 7);
- skip_bits_long(gb, 48);
+ bitstream_skip(bc, 48);
- mh->is_vbr = get_bits1(gb);
+ mh->is_vbr = bitstream_read_bit(bc);
- mh->peak_bitrate = (get_bits(gb, 15) * mh->group1_samplerate + 8) >> 4;
+ mh->peak_bitrate = (bitstream_read(bc, 15) * mh->group1_samplerate + 8) >> 4;
- mh->num_substreams = get_bits(gb, 4);
+ mh->num_substreams = bitstream_read(bc, 4);
- skip_bits_long(gb, 4 + (header_size - 17) * 8);
+ bitstream_skip(bc, 4 + (header_size - 17) * 8);
return 0;
}
@@ -328,11 +329,11 @@ static int mlp_parse(AVCodecParserContext *s,
goto lost_sync;
}
} else {
- GetBitContext gb;
+ BitstreamContext bc;
MLPHeaderInfo mh;
- init_get_bits(&gb, buf + 4, (buf_size - 4) << 3);
- if (ff_mlp_read_major_sync(avctx, &mh, &gb) < 0)
+ bitstream_init(&bc, buf + 4, (buf_size - 4) << 3);
+ if (ff_mlp_read_major_sync(avctx, &mh, &bc) < 0)
goto lost_sync;
avctx->bits_per_raw_sample = mh.group1_bits;
diff --git a/libavcodec/mlp_parser.h b/libavcodec/mlp_parser.h
index 8a2ae133b6..871b96db20 100644
--- a/libavcodec/mlp_parser.h
+++ b/libavcodec/mlp_parser.h
@@ -27,7 +27,7 @@
#ifndef AVCODEC_MLP_PARSER_H
#define AVCODEC_MLP_PARSER_H
-#include "get_bits.h"
+#include "bitstream.h"
typedef struct MLPHeaderInfo
{
@@ -61,6 +61,6 @@ typedef struct MLPHeaderInfo
} MLPHeaderInfo;
-int ff_mlp_read_major_sync(void *log, MLPHeaderInfo *mh, GetBitContext *gb);
+int ff_mlp_read_major_sync(void *log, MLPHeaderInfo *mh, BitstreamContext *bc);
#endif /* AVCODEC_MLP_PARSER_H */
diff --git a/libavcodec/mlpdec.c b/libavcodec/mlpdec.c
index 8cfeea6175..40889161f8 100644
--- a/libavcodec/mlpdec.c
+++ b/libavcodec/mlpdec.c
@@ -26,13 +26,14 @@
#include <stdint.h>
-#include "avcodec.h"
#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/channel_layout.h"
-#include "get_bits.h"
-#include "internal.h"
#include "libavutil/crc.h"
+
+#include "avcodec.h"
+#include "bitstream.h"
+#include "internal.h"
#include "parser.h"
#include "mlp_parser.h"
#include "mlpdsp.h"
@@ -233,7 +234,7 @@ static inline int32_t calculate_sign_huff(MLPDecodeContext *m,
/** Read a sample, consisting of either, both or neither of entropy-coded MSBs
* and plain LSBs. */
-static inline int read_huff_channels(MLPDecodeContext *m, GetBitContext *gbp,
+static inline int read_huff_channels(MLPDecodeContext *m, BitstreamContext *bc,
unsigned int substr, unsigned int pos)
{
SubStream *s = &m->substream[substr];
@@ -241,7 +242,7 @@ static inline int read_huff_channels(MLPDecodeContext *m, GetBitContext *gbp,
for (mat = 0; mat < s->num_primitive_matrices; mat++)
if (s->lsb_bypass[mat])
- m->bypassed_lsbs[pos + s->blockpos][mat] = get_bits1(gbp);
+ m->bypassed_lsbs[pos + s->blockpos][mat] = bitstream_read_bit(bc);
for (channel = s->min_channel; channel <= s->max_channel; channel++) {
ChannelParams *cp = &s->channel_params[channel];
@@ -251,14 +252,15 @@ static inline int read_huff_channels(MLPDecodeContext *m, GetBitContext *gbp,
int result = 0;
if (codebook > 0)
- result = get_vlc2(gbp, huff_vlc[codebook-1].table,
- VLC_BITS, (9 + VLC_BITS - 1) / VLC_BITS);
+ result = bitstream_read_vlc(bc, huff_vlc[codebook-1].table,
+ VLC_BITS,
+ (9 + VLC_BITS - 1) / VLC_BITS);
if (result < 0)
return AVERROR_INVALIDDATA;
if (lsb_bits > 0)
- result = (result << lsb_bits) + get_bits(gbp, lsb_bits);
+ result = (result << lsb_bits) + bitstream_read(bc, lsb_bits);
result += cp->sign_huff_offset;
result <<= quant_step_size;
@@ -288,12 +290,12 @@ static av_cold int mlp_decode_init(AVCodecContext *avctx)
* information is not actually necessary for decoding, only for playback.
*/
-static int read_major_sync(MLPDecodeContext *m, GetBitContext *gb)
+static int read_major_sync(MLPDecodeContext *m, BitstreamContext *bc)
{
MLPHeaderInfo mh;
int substr, ret;
- if ((ret = ff_mlp_read_major_sync(m->avctx, &mh, gb)) != 0)
+ if ((ret = ff_mlp_read_major_sync(m->avctx, &mh, bc)) != 0)
return ret;
if (mh.group1_bits == 0) {
@@ -441,7 +443,7 @@ static int read_major_sync(MLPDecodeContext *m, GetBitContext *gb)
* required to decode the audio that do not change very often. Generally
* (always) present only in blocks following a major sync. */
-static int read_restart_header(MLPDecodeContext *m, GetBitContext *gbp,
+static int read_restart_header(MLPDecodeContext *m, BitstreamContext *bc,
const uint8_t *buf, unsigned int substr)
{
SubStream *s = &m->substream[substr];
@@ -449,13 +451,13 @@ static int read_restart_header(MLPDecodeContext *m, GetBitContext *gbp,
int sync_word, tmp;
uint8_t checksum;
uint8_t lossless_check;
- int start_count = get_bits_count(gbp);
+ int start_count = bitstream_tell(bc);
int min_channel, max_channel, max_matrix_channel;
const int std_max_matrix_channel = m->avctx->codec_id == AV_CODEC_ID_MLP
? MAX_MATRIX_CHANNEL_MLP
: MAX_MATRIX_CHANNEL_TRUEHD;
- sync_word = get_bits(gbp, 13);
+ sync_word = bitstream_read(bc, 13);
if (sync_word != 0x31ea >> 1) {
av_log(m->avctx, AV_LOG_ERROR,
@@ -463,18 +465,18 @@ static int read_restart_header(MLPDecodeContext *m, GetBitContext *gbp,
return AVERROR_INVALIDDATA;
}
- s->noise_type = get_bits1(gbp);
+ s->noise_type = bitstream_read_bit(bc);
if (m->avctx->codec_id == AV_CODEC_ID_MLP && s->noise_type) {
av_log(m->avctx, AV_LOG_ERROR, "MLP must have 0x31ea sync word.\n");
return AVERROR_INVALIDDATA;
}
- skip_bits(gbp, 16); /* Output timestamp */
+ bitstream_skip(bc, 16); /* Output timestamp */
- min_channel = get_bits(gbp, 4);
- max_channel = get_bits(gbp, 4);
- max_matrix_channel = get_bits(gbp, 4);
+ min_channel = bitstream_read(bc, 4);
+ max_channel = bitstream_read(bc, 4);
+ max_matrix_channel = bitstream_read(bc, 4);
if (max_matrix_channel > std_max_matrix_channel) {
av_log(m->avctx, AV_LOG_ERROR,
@@ -518,13 +520,13 @@ static int read_restart_header(MLPDecodeContext *m, GetBitContext *gbp,
m->max_decoded_substream = substr;
}
- s->noise_shift = get_bits(gbp, 4);
- s->noisegen_seed = get_bits(gbp, 23);
+ s->noise_shift = bitstream_read(bc, 4);
+ s->noisegen_seed = bitstream_read(bc, 23);
- skip_bits(gbp, 19);
+ bitstream_skip(bc, 19);
- s->data_check_present = get_bits1(gbp);
- lossless_check = get_bits(gbp, 8);
+ s->data_check_present = bitstream_read_bit(bc);
+ lossless_check = bitstream_read(bc, 8);
if (substr == m->max_decoded_substream
&& s->lossless_check_data != 0xffffffff) {
tmp = xor_32_to_8(s->lossless_check_data);
@@ -534,12 +536,12 @@ static int read_restart_header(MLPDecodeContext *m, GetBitContext *gbp,
lossless_check, tmp);
}
- skip_bits(gbp, 16);
+ bitstream_skip(bc, 16);
memset(s->ch_assign, 0, sizeof(s->ch_assign));
for (ch = 0; ch <= s->max_matrix_channel; ch++) {
- int ch_assign = get_bits(gbp, 6);
+ int ch_assign = bitstream_read(bc, 6);
if (m->avctx->codec_id == AV_CODEC_ID_TRUEHD) {
uint64_t channel = thd_channel_layout_extract_channel(s->ch_layout,
ch_assign);
@@ -555,9 +557,9 @@ static int read_restart_header(MLPDecodeContext *m, GetBitContext *gbp,
s->ch_assign[ch_assign] = ch;
}
- checksum = ff_mlp_restart_checksum(buf, get_bits_count(gbp) - start_count);
+ checksum = ff_mlp_restart_checksum(buf, bitstream_tell(bc) - start_count);
- if (checksum != get_bits(gbp, 8))
+ if (checksum != bitstream_read(bc, 8))
av_log(m->avctx, AV_LOG_ERROR, "restart header checksum error\n");
/* Set default decoding parameters. */
@@ -597,7 +599,7 @@ static int read_restart_header(MLPDecodeContext *m, GetBitContext *gbp,
/** Read parameters for one of the prediction filters. */
-static int read_filter_params(MLPDecodeContext *m, GetBitContext *gbp,
+static int read_filter_params(MLPDecodeContext *m, BitstreamContext *bc,
unsigned int substr, unsigned int channel,
unsigned int filter)
{
@@ -615,7 +617,7 @@ static int read_filter_params(MLPDecodeContext *m, GetBitContext *gbp,
return AVERROR_INVALIDDATA;
}
- order = get_bits(gbp, 4);
+ order = bitstream_read(bc, 4);
if (order > max_order) {
av_log(m->avctx, AV_LOG_ERROR,
"%cIR filter order %d is greater than maximum %d.\n",
@@ -628,10 +630,10 @@ static int read_filter_params(MLPDecodeContext *m, GetBitContext *gbp,
int32_t *fcoeff = s->channel_params[channel].coeff[filter];
int coeff_bits, coeff_shift;
- fp->shift = get_bits(gbp, 4);
+ fp->shift = bitstream_read(bc, 4);
- coeff_bits = get_bits(gbp, 5);
- coeff_shift = get_bits(gbp, 3);
+ coeff_bits = bitstream_read(bc, 5);
+ coeff_shift = bitstream_read(bc, 3);
if (coeff_bits < 1 || coeff_bits > 16) {
av_log(m->avctx, AV_LOG_ERROR,
"%cIR filter coeff_bits must be between 1 and 16.\n",
@@ -646,9 +648,9 @@ static int read_filter_params(MLPDecodeContext *m, GetBitContext *gbp,
}
for (i = 0; i < order; i++)
- fcoeff[i] = get_sbits(gbp, coeff_bits) << coeff_shift;
+ fcoeff[i] = bitstream_read_signed(bc, coeff_bits) << coeff_shift;
- if (get_bits1(gbp)) {
+ if (bitstream_read_bit(bc)) {
int state_bits, state_shift;
if (filter == FIR) {
@@ -657,13 +659,13 @@ static int read_filter_params(MLPDecodeContext *m, GetBitContext *gbp,
return AVERROR_INVALIDDATA;
}
- state_bits = get_bits(gbp, 4);
- state_shift = get_bits(gbp, 4);
+ state_bits = bitstream_read(bc, 4);
+ state_shift = bitstream_read(bc, 4);
/* TODO: Check validity of state data. */
for (i = 0; i < order; i++)
- fp->state[i] = get_sbits(gbp, state_bits) << state_shift;
+ fp->state[i] = bitstream_read_signed(bc, state_bits) << state_shift;
}
}
@@ -672,7 +674,8 @@ static int read_filter_params(MLPDecodeContext *m, GetBitContext *gbp,
/** Read parameters for primitive matrices. */
-static int read_matrix_params(MLPDecodeContext *m, unsigned int substr, GetBitContext *gbp)
+static int read_matrix_params(MLPDecodeContext *m, unsigned int substr,
+ BitstreamContext *bc)
{
SubStream *s = &m->substream[substr];
unsigned int mat, ch;
@@ -685,7 +688,7 @@ static int read_matrix_params(MLPDecodeContext *m, unsigned int substr, GetBitCo
return AVERROR_INVALIDDATA;
}
- s->num_primitive_matrices = get_bits(gbp, 4);
+ s->num_primitive_matrices = bitstream_read(bc, 4);
if (s->num_primitive_matrices > max_primitive_matrices) {
av_log(m->avctx, AV_LOG_ERROR,
@@ -696,9 +699,9 @@ static int read_matrix_params(MLPDecodeContext *m, unsigned int substr, GetBitCo
for (mat = 0; mat < s->num_primitive_matrices; mat++) {
int frac_bits, max_chan;
- s->matrix_out_ch[mat] = get_bits(gbp, 4);
- frac_bits = get_bits(gbp, 4);
- s->lsb_bypass [mat] = get_bits1(gbp);
+ s->matrix_out_ch[mat] = bitstream_read(bc, 4);
+ frac_bits = bitstream_read(bc, 4);
+ s->lsb_bypass[mat] = bitstream_read_bit(bc);
if (s->matrix_out_ch[mat] > s->max_matrix_channel) {
av_log(m->avctx, AV_LOG_ERROR,
@@ -718,14 +721,14 @@ static int read_matrix_params(MLPDecodeContext *m, unsigned int substr, GetBitCo
for (ch = 0; ch <= max_chan; ch++) {
int coeff_val = 0;
- if (get_bits1(gbp))
- coeff_val = get_sbits(gbp, frac_bits + 2);
+ if (bitstream_read_bit(bc))
+ coeff_val = bitstream_read_signed(bc, frac_bits + 2);
s->matrix_coeff[mat][ch] = coeff_val << (14 - frac_bits);
}
if (s->noise_type)
- s->matrix_noise_shift[mat] = get_bits(gbp, 4);
+ s->matrix_noise_shift[mat] = bitstream_read(bc, 4);
else
s->matrix_noise_shift[mat] = 0;
}
@@ -736,7 +739,7 @@ static int read_matrix_params(MLPDecodeContext *m, unsigned int substr, GetBitCo
/** Read channel parameters. */
static int read_channel_params(MLPDecodeContext *m, unsigned int substr,
- GetBitContext *gbp, unsigned int ch)
+ BitstreamContext *bc, unsigned int ch)
{
SubStream *s = &m->substream[substr];
ChannelParams *cp = &s->channel_params[ch];
@@ -745,13 +748,13 @@ static int read_channel_params(MLPDecodeContext *m, unsigned int substr,
int ret;
if (s->param_presence_flags & PARAM_FIR)
- if (get_bits1(gbp))
- if ((ret = read_filter_params(m, gbp, substr, ch, FIR)) < 0)
+ if (bitstream_read_bit(bc))
+ if ((ret = read_filter_params(m, bc, substr, ch, FIR)) < 0)
return ret;
if (s->param_presence_flags & PARAM_IIR)
- if (get_bits1(gbp))
- if ((ret = read_filter_params(m, gbp, substr, ch, IIR)) < 0)
+ if (bitstream_read_bit(bc))
+ if ((ret = read_filter_params(m, bc, substr, ch, IIR)) < 0)
return ret;
if (fir->order + iir->order > 8) {
@@ -774,11 +777,11 @@ static int read_channel_params(MLPDecodeContext *m, unsigned int substr,
fir->shift = iir->shift;
if (s->param_presence_flags & PARAM_HUFFOFFSET)
- if (get_bits1(gbp))
- cp->huff_offset = get_sbits(gbp, 15);
+ if (bitstream_read_bit(bc))
+ cp->huff_offset = bitstream_read_signed(bc, 15);
- cp->codebook = get_bits(gbp, 2);
- cp->huff_lsbs = get_bits(gbp, 5);
+ cp->codebook = bitstream_read(bc, 2);
+ cp->huff_lsbs = bitstream_read(bc, 5);
if (cp->huff_lsbs > 24) {
av_log(m->avctx, AV_LOG_ERROR, "Invalid huff_lsbs.\n");
@@ -793,7 +796,7 @@ static int read_channel_params(MLPDecodeContext *m, unsigned int substr,
/** Read decoding parameters that change more often than those in the restart
* header. */
-static int read_decoding_params(MLPDecodeContext *m, GetBitContext *gbp,
+static int read_decoding_params(MLPDecodeContext *m, BitstreamContext *bc,
unsigned int substr)
{
SubStream *s = &m->substream[substr];
@@ -801,12 +804,12 @@ static int read_decoding_params(MLPDecodeContext *m, GetBitContext *gbp,
int ret;
if (s->param_presence_flags & PARAM_PRESENCE)
- if (get_bits1(gbp))
- s->param_presence_flags = get_bits(gbp, 8);
+ if (bitstream_read_bit(bc))
+ s->param_presence_flags = bitstream_read(bc, 8);
if (s->param_presence_flags & PARAM_BLOCKSIZE)
- if (get_bits1(gbp)) {
- s->blocksize = get_bits(gbp, 9);
+ if (bitstream_read_bit(bc)) {
+ s->blocksize = bitstream_read(bc, 9);
if (s->blocksize < 8 || s->blocksize > m->access_unit_size) {
av_log(m->avctx, AV_LOG_ERROR, "Invalid blocksize.");
s->blocksize = 0;
@@ -815,14 +818,14 @@ static int read_decoding_params(MLPDecodeContext *m, GetBitContext *gbp,
}
if (s->param_presence_flags & PARAM_MATRIX)
- if (get_bits1(gbp))
- if ((ret = read_matrix_params(m, substr, gbp)) < 0)
+ if (bitstream_read_bit(bc))
+ if ((ret = read_matrix_params(m, substr, bc)) < 0)
return ret;
if (s->param_presence_flags & PARAM_OUTSHIFT)
- if (get_bits1(gbp)) {
+ if (bitstream_read_bit(bc)) {
for (ch = 0; ch <= s->max_matrix_channel; ch++)
- s->output_shift[ch] = get_sbits(gbp, 4);
+ s->output_shift[ch] = bitstream_read_signed(bc, 4);
if (substr == m->max_decoded_substream)
m->dsp.mlp_pack_output = m->dsp.mlp_select_pack_output(s->ch_assign,
s->output_shift,
@@ -831,18 +834,18 @@ static int read_decoding_params(MLPDecodeContext *m, GetBitContext *gbp,
}
if (s->param_presence_flags & PARAM_QUANTSTEP)
- if (get_bits1(gbp))
+ if (bitstream_read_bit(bc))
for (ch = 0; ch <= s->max_channel; ch++) {
ChannelParams *cp = &s->channel_params[ch];
- s->quant_step_size[ch] = get_bits(gbp, 4);
+ s->quant_step_size[ch] = bitstream_read(bc, 4);
cp->sign_huff_offset = calculate_sign_huff(m, substr, ch);
}
for (ch = s->min_channel; ch <= s->max_channel; ch++)
- if (get_bits1(gbp))
- if ((ret = read_channel_params(m, substr, gbp, ch)) < 0)
+ if (bitstream_read_bit(bc))
+ if ((ret = read_channel_params(m, substr, bc, ch)) < 0)
return ret;
return 0;
@@ -880,7 +883,7 @@ static void filter_channel(MLPDecodeContext *m, unsigned int substr,
/** Read a block of PCM residual data (or actual if no filtering active). */
-static int read_block_data(MLPDecodeContext *m, GetBitContext *gbp,
+static int read_block_data(MLPDecodeContext *m, BitstreamContext *bc,
unsigned int substr)
{
SubStream *s = &m->substream[substr];
@@ -888,8 +891,8 @@ static int read_block_data(MLPDecodeContext *m, GetBitContext *gbp,
int ret;
if (s->data_check_present) {
- expected_stream_pos = get_bits_count(gbp);
- expected_stream_pos += get_bits(gbp, 16);
+ expected_stream_pos = bitstream_tell(bc);
+ expected_stream_pos += bitstream_read(bc, 16);
avpriv_request_sample(m->avctx,
"Substreams with VLC block size check info");
}
@@ -903,7 +906,7 @@ static int read_block_data(MLPDecodeContext *m, GetBitContext *gbp,
s->blocksize * sizeof(m->bypassed_lsbs[0]));
for (i = 0; i < s->blocksize; i++)
- if ((ret = read_huff_channels(m, gbp, substr, i)) < 0)
+ if ((ret = read_huff_channels(m, bc, substr, i)) < 0)
return ret;
for (ch = s->min_channel; ch <= s->max_channel; ch++)
@@ -912,9 +915,9 @@ static int read_block_data(MLPDecodeContext *m, GetBitContext *gbp,
s->blockpos += s->blocksize;
if (s->data_check_present) {
- if (get_bits_count(gbp) != expected_stream_pos)
+ if (bitstream_tell(bc) != expected_stream_pos)
av_log(m->avctx, AV_LOG_ERROR, "block data length mismatch\n");
- skip_bits(gbp, 8);
+ bitstream_skip(bc, 8);
}
return 0;
@@ -1074,7 +1077,7 @@ static int read_access_unit(AVCodecContext *avctx, void* data,
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
MLPDecodeContext *m = avctx->priv_data;
- GetBitContext gb;
+ BitstreamContext bc;
unsigned int length, substr;
unsigned int substream_start;
unsigned int header_size = 4;
@@ -1092,11 +1095,11 @@ static int read_access_unit(AVCodecContext *avctx, void* data,
if (length < 4 || length > buf_size)
return AVERROR_INVALIDDATA;
- init_get_bits(&gb, (buf + 4), (length - 4) * 8);
+ bitstream_init(&bc, (buf + 4), (length - 4) * 8);
m->is_major_sync_unit = 0;
- if (show_bits_long(&gb, 31) == (0xf8726fba >> 1)) {
- if (read_major_sync(m, &gb) < 0)
+ if (bitstream_peek(&bc, 31) == (0xf8726fba >> 1)) {
+ if (read_major_sync(m, &bc) < 0)
goto error;
m->is_major_sync_unit = 1;
header_size += m->major_sync_header_size;
@@ -1114,12 +1117,12 @@ static int read_access_unit(AVCodecContext *avctx, void* data,
for (substr = 0; substr < m->num_substreams; substr++) {
int extraword_present, checkdata_present, end, nonrestart_substr;
- extraword_present = get_bits1(&gb);
- nonrestart_substr = get_bits1(&gb);
- checkdata_present = get_bits1(&gb);
- skip_bits1(&gb);
+ extraword_present = bitstream_read_bit(&bc);
+ nonrestart_substr = bitstream_read_bit(&bc);
+ checkdata_present = bitstream_read_bit(&bc);
+ bitstream_skip(&bc, 1);
- end = get_bits(&gb, 12) * 2;
+ end = bitstream_read(&bc, 12) * 2;
substr_header_size += 2;
@@ -1128,7 +1131,7 @@ static int read_access_unit(AVCodecContext *avctx, void* data,
av_log(m->avctx, AV_LOG_ERROR, "There must be no extraword for MLP.\n");
goto error;
}
- skip_bits(&gb, 16);
+ bitstream_skip(&bc, 16);
substr_header_size += 2;
}
@@ -1172,47 +1175,47 @@ static int read_access_unit(AVCodecContext *avctx, void* data,
for (substr = 0; substr <= m->max_decoded_substream; substr++) {
SubStream *s = &m->substream[substr];
- init_get_bits(&gb, buf, substream_data_len[substr] * 8);
+ bitstream_init(&bc, buf, substream_data_len[substr] * 8);
m->matrix_changed = 0;
memset(m->filter_changed, 0, sizeof(m->filter_changed));
s->blockpos = 0;
do {
- if (get_bits1(&gb)) {
- if (get_bits1(&gb)) {
+ if (bitstream_read_bit(&bc)) {
+ if (bitstream_read_bit(&bc)) {
/* A restart header should be present. */
- if (read_restart_header(m, &gb, buf, substr) < 0)
+ if (read_restart_header(m, &bc, buf, substr) < 0)
goto next_substr;
s->restart_seen = 1;
}
if (!s->restart_seen)
goto next_substr;
- if (read_decoding_params(m, &gb, substr) < 0)
+ if (read_decoding_params(m, &bc, substr) < 0)
goto next_substr;
}
if (!s->restart_seen)
goto next_substr;
- if ((ret = read_block_data(m, &gb, substr)) < 0)
+ if ((ret = read_block_data(m, &bc, substr)) < 0)
return ret;
- if (get_bits_count(&gb) >= substream_data_len[substr] * 8)
+ if (bitstream_tell(&bc) >= substream_data_len[substr] * 8)
goto substream_length_mismatch;
- } while (!get_bits1(&gb));
+ } while (!bitstream_read_bit(&bc));
- skip_bits(&gb, (-get_bits_count(&gb)) & 15);
+ bitstream_skip(&bc, (-bitstream_tell(&bc)) & 15);
- if (substream_data_len[substr] * 8 - get_bits_count(&gb) >= 32) {
+ if (substream_data_len[substr] * 8 - bitstream_tell(&bc) >= 32) {
int shorten_by;
- if (get_bits(&gb, 16) != 0xD234)
+ if (bitstream_read(&bc, 16) != 0xD234)
return AVERROR_INVALIDDATA;
- shorten_by = get_bits(&gb, 16);
+ shorten_by = bitstream_read(&bc, 16);
if (m->avctx->codec_id == AV_CODEC_ID_TRUEHD && shorten_by & 0x2000)
s->blockpos -= FFMIN(shorten_by & 0x1FFF, s->blockpos);
else if (m->avctx->codec_id == AV_CODEC_ID_MLP && shorten_by != 0xD234)
@@ -1225,19 +1228,19 @@ static int read_access_unit(AVCodecContext *avctx, void* data,
if (substream_parity_present[substr]) {
uint8_t parity, checksum;
- if (substream_data_len[substr] * 8 - get_bits_count(&gb) != 16)
+ if (substream_data_len[substr] * 8 - bitstream_tell(&bc) != 16)
goto substream_length_mismatch;
parity = ff_mlp_calculate_parity(buf, substream_data_len[substr] - 2);
checksum = ff_mlp_checksum8 (buf, substream_data_len[substr] - 2);
- if ((get_bits(&gb, 8) ^ parity) != 0xa9 )
+ if ((bitstream_read(&bc, 8) ^ parity) != 0xa9)
av_log(m->avctx, AV_LOG_ERROR, "Substream %d parity check failed.\n", substr);
- if ( get_bits(&gb, 8) != checksum)
+ if (bitstream_read(&bc, 8) != checksum)
av_log(m->avctx, AV_LOG_ERROR, "Substream %d checksum failed.\n" , substr);
}
- if (substream_data_len[substr] * 8 != get_bits_count(&gb))
+ if (substream_data_len[substr] * 8 != bitstream_tell(&bc))
goto substream_length_mismatch;
next_substr:
More information about the ffmpeg-cvslog
mailing list