* The simplest AC-3 encoder.
*/
-//#define ASSERT_LEVEL 2
-
#include <stdint.h>
-#include "libavutil/audioconvert.h"
+#include "libavutil/attributes.h"
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
+#include "libavutil/channel_layout.h"
#include "libavutil/crc.h"
+#include "libavutil/internal.h"
#include "libavutil/opt.h"
#include "avcodec.h"
+#include "me_cmp.h"
#include "put_bits.h"
-#include "dsputil.h"
+#include "audiodsp.h"
#include "ac3dsp.h"
#include "ac3.h"
-#include "audioconvert.h"
#include "fft.h"
+#include "internal.h"
#include "ac3enc.h"
#include "eac3enc.h"
typedef struct AC3Mant {
- uint16_t *qmant1_ptr, *qmant2_ptr, *qmant4_ptr; ///< mantissa pointers for bap=1,2,4
+ int16_t *qmant1_ptr, *qmant2_ptr, *qmant4_ptr; ///< mantissa pointers for bap=1,2,4
int mant1_cnt, mant2_cnt, mant4_cnt; ///< mantissa counts for bap=1,2,4
} AC3Mant;
/**
* List of supported channel layouts.
*/
-const int64_t ff_ac3_channel_layouts[19] = {
+const uint64_t ff_ac3_channel_layouts[19] = {
AV_CH_LAYOUT_MONO,
AV_CH_LAYOUT_STEREO,
AV_CH_LAYOUT_2_1,
/**
* Adjust the frame size to make the average bit rate match the target bit rate.
* This is only needed for 11025, 22050, and 44100 sample rates or any E-AC-3.
+ *
+ * @param s AC-3 encoder private context
*/
-static void adjust_frame_size(AC3EncodeContext *s)
+void ff_ac3_adjust_frame_size(AC3EncodeContext *s)
{
while (s->bits_written >= s->bit_rate && s->samples_written >= s->sample_rate) {
s->bits_written -= s->bit_rate;
s->frame_size = s->frame_size_min +
2 * (s->bits_written * s->sample_rate < s->samples_written * s->bit_rate);
s->bits_written += s->frame_size * 8;
- s->samples_written += AC3_FRAME_SIZE;
+ s->samples_written += AC3_BLOCK_SIZE * s->num_blocks;
}
-static void compute_coupling_strategy(AC3EncodeContext *s)
+/**
+ * Set the initial coupling strategy parameters prior to coupling analysis.
+ *
+ * @param s AC-3 encoder private context
+ */
+void ff_ac3_compute_coupling_strategy(AC3EncodeContext *s)
{
int blk, ch;
int got_cpl_snr;
+ int num_cpl_blocks;
/* set coupling use flags for each block/channel */
/* TODO: turn coupling on/off and adjust start band based on bit usage */
- for (blk = 0; blk < AC3_MAX_BLOCKS; blk++) {
+ for (blk = 0; blk < s->num_blocks; blk++) {
AC3Block *block = &s->blocks[blk];
for (ch = 1; ch <= s->fbw_channels; ch++)
block->channel_in_cpl[ch] = s->cpl_on;
/* enable coupling for each block if at least 2 channels have coupling
enabled for that block */
got_cpl_snr = 0;
- for (blk = 0; blk < AC3_MAX_BLOCKS; blk++) {
+ num_cpl_blocks = 0;
+ for (blk = 0; blk < s->num_blocks; blk++) {
AC3Block *block = &s->blocks[blk];
block->num_cpl_channels = 0;
for (ch = 1; ch <= s->fbw_channels; ch++)
block->num_cpl_channels += block->channel_in_cpl[ch];
block->cpl_in_use = block->num_cpl_channels > 1;
+ num_cpl_blocks += block->cpl_in_use;
if (!block->cpl_in_use) {
block->num_cpl_channels = 0;
for (ch = 1; ch <= s->fbw_channels; ch++)
block->new_snr_offsets = 0;
}
}
+ if (!num_cpl_blocks)
+ s->cpl_on = 0;
/* set bandwidth for each channel */
- for (blk = 0; blk < AC3_MAX_BLOCKS; blk++) {
+ for (blk = 0; blk < s->num_blocks; blk++) {
AC3Block *block = &s->blocks[blk];
for (ch = 1; ch <= s->fbw_channels; ch++) {
if (block->channel_in_cpl[ch])
/**
* Apply stereo rematrixing to coefficients based on rematrixing flags.
+ *
+ * @param s AC-3 encoder private context
*/
-static void apply_rematrixing(AC3EncodeContext *s)
+void ff_ac3_apply_rematrixing(AC3EncodeContext *s)
{
int nb_coefs;
int blk, bnd, i;
if (!s->rematrixing_enabled)
return;
- for (blk = 0; blk < AC3_MAX_BLOCKS; blk++) {
+ for (blk = 0; blk < s->num_blocks; blk++) {
AC3Block *block = &s->blocks[blk];
if (block->new_rematrixing_strategy)
flags = block->rematrixing_flags;
}
-/**
+/*
* Initialize exponent tables.
*/
static av_cold void exponent_init(AC3EncodeContext *s)
}
/* LFE */
exponent_group_tab[0][0][7] = 2;
+
+ if (CONFIG_EAC3_ENCODER && s->eac3)
+ ff_eac3_exponent_init();
}
-/**
+/*
* Extract exponents from the MDCT coefficients.
- * This takes into account the normalization that was done to the input samples
- * by adjusting the exponents by the exponent shift values.
*/
static void extract_exponents(AC3EncodeContext *s)
{
int ch = !s->cpl_on;
- int chan_size = AC3_MAX_COEFS * AC3_MAX_BLOCKS * (s->channels - ch + 1);
+ int chan_size = AC3_MAX_COEFS * s->num_blocks * (s->channels - ch + 1);
AC3Block *block = &s->blocks[0];
s->ac3dsp.extract_exponents(block->exp[ch], block->fixed_coef[ch], chan_size);
*/
#define EXP_DIFF_THRESHOLD 500
-
/**
+ * Table used to select exponent strategy based on exponent reuse block interval.
+ */
+static const uint8_t exp_strategy_reuse_tab[4][6] = {
+ { EXP_D15, EXP_D15, EXP_D15, EXP_D15, EXP_D15, EXP_D15 },
+ { EXP_D15, EXP_D15, EXP_D15, EXP_D15, EXP_D15, EXP_D15 },
+ { EXP_D25, EXP_D25, EXP_D15, EXP_D15, EXP_D15, EXP_D15 },
+ { EXP_D45, EXP_D25, EXP_D25, EXP_D15, EXP_D15, EXP_D15 }
+};
+
+/*
* Calculate exponent strategies for all channels.
* Array arrangement is reversed to simplify the per-channel calculation.
*/
reused in the next frame */
exp_strategy[0] = EXP_NEW;
exp += AC3_MAX_COEFS;
- for (blk = 1; blk < AC3_MAX_BLOCKS; blk++, exp += AC3_MAX_COEFS) {
- if ((ch == CPL_CH && (!s->blocks[blk].cpl_in_use || !s->blocks[blk-1].cpl_in_use)) ||
- (ch > CPL_CH && (s->blocks[blk].channel_in_cpl[ch] != s->blocks[blk-1].channel_in_cpl[ch]))) {
+ for (blk = 1; blk < s->num_blocks; blk++, exp += AC3_MAX_COEFS) {
+ if (ch == CPL_CH) {
+ if (!s->blocks[blk-1].cpl_in_use) {
+ exp_strategy[blk] = EXP_NEW;
+ continue;
+ } else if (!s->blocks[blk].cpl_in_use) {
+ exp_strategy[blk] = EXP_REUSE;
+ continue;
+ }
+ } else if (s->blocks[blk].channel_in_cpl[ch] != s->blocks[blk-1].channel_in_cpl[ch]) {
exp_strategy[blk] = EXP_NEW;
continue;
}
- exp_diff = s->dsp.sad[0](NULL, exp, exp - AC3_MAX_COEFS, 16, 16);
+ exp_diff = s->mecc.sad[0](NULL, exp, exp - AC3_MAX_COEFS, 16, 16);
exp_strategy[blk] = EXP_REUSE;
if (ch == CPL_CH && exp_diff > (EXP_DIFF_THRESHOLD * (s->blocks[blk].end_freq[ch] - s->start_freq[ch]) / AC3_MAX_COEFS))
exp_strategy[blk] = EXP_NEW;
/* now select the encoding strategy type : if exponents are often
recoded, we use a coarse encoding */
blk = 0;
- while (blk < AC3_MAX_BLOCKS) {
+ while (blk < s->num_blocks) {
blk1 = blk + 1;
- while (blk1 < AC3_MAX_BLOCKS && exp_strategy[blk1] == EXP_REUSE)
+ while (blk1 < s->num_blocks && exp_strategy[blk1] == EXP_REUSE)
blk1++;
- switch (blk1 - blk) {
- case 1: exp_strategy[blk] = EXP_D45; break;
- case 2:
- case 3: exp_strategy[blk] = EXP_D25; break;
- default: exp_strategy[blk] = EXP_D15; break;
- }
+ exp_strategy[blk] = exp_strategy_reuse_tab[s->num_blks_code][blk1-blk-1];
blk = blk1;
}
}
if (s->lfe_on) {
ch = s->lfe_channel;
s->exp_strategy[ch][0] = EXP_D15;
- for (blk = 1; blk < AC3_MAX_BLOCKS; blk++)
+ for (blk = 1; blk < s->num_blocks; blk++)
s->exp_strategy[ch][blk] = EXP_REUSE;
}
+
+ /* for E-AC-3, determine frame exponent strategy */
+ if (CONFIG_EAC3_ENCODER && s->eac3)
+ ff_eac3_get_frame_exp_strategy(s);
}
/**
* Update the exponents so that they are the ones the decoder will decode.
+ *
+ * @param[in,out] exp array of exponents for 1 block in 1 channel
+ * @param nb_exps number of exponents in active bandwidth
+ * @param exp_strategy exponent strategy for the block
+ * @param cpl indicates if the block is in the coupling channel
*/
static void encode_exponents_blk_ch(uint8_t *exp, int nb_exps, int exp_strategy,
int cpl)
}
-/**
+/*
* Encode exponents from original extracted form to what the decoder will see.
* This copies and groups exponents based on exponent strategy and reduces
* deltas between adjacent exponent groups so that they can be differentially
cpl = (ch == CPL_CH);
blk = 0;
- while (blk < AC3_MAX_BLOCKS) {
+ while (blk < s->num_blocks) {
AC3Block *block = &s->blocks[blk];
if (cpl && !block->cpl_in_use) {
exp += AC3_MAX_COEFS;
/* count the number of EXP_REUSE blocks after the current block
and set exponent reference block numbers */
s->exp_ref_block[ch][blk] = blk;
- while (blk1 < AC3_MAX_BLOCKS && exp_strategy[blk1] == EXP_REUSE) {
+ while (blk1 < s->num_blocks && exp_strategy[blk1] == EXP_REUSE) {
s->exp_ref_block[ch][blk1] = blk;
blk1++;
}
}
+/*
+ * Count exponent bits based on bandwidth, coupling, and exponent strategies.
+ */
+static int count_exponent_bits(AC3EncodeContext *s)
+{
+ int blk, ch;
+ int nb_groups, bit_count;
+
+ bit_count = 0;
+ for (blk = 0; blk < s->num_blocks; blk++) {
+ AC3Block *block = &s->blocks[blk];
+ for (ch = !block->cpl_in_use; ch <= s->channels; ch++) {
+ int exp_strategy = s->exp_strategy[ch][blk];
+ int cpl = (ch == CPL_CH);
+ int nb_coefs = block->end_freq[ch] - s->start_freq[ch];
+
+ if (exp_strategy == EXP_REUSE)
+ continue;
+
+ nb_groups = exponent_group_tab[cpl][exp_strategy-1][nb_coefs];
+ bit_count += 4 + (nb_groups * 7);
+ }
+ }
+
+ return bit_count;
+}
+
+
/**
* Group exponents.
* 3 delta-encoded exponents are in each 7-bit group. The number of groups
* varies depending on exponent strategy and bandwidth.
+ *
+ * @param s AC-3 encoder private context
*/
-static void group_exponents(AC3EncodeContext *s)
+void ff_ac3_group_exponents(AC3EncodeContext *s)
{
int blk, ch, i, cpl;
- int group_size, nb_groups, bit_count;
+ int group_size, nb_groups;
uint8_t *p;
int delta0, delta1, delta2;
int exp0, exp1;
- bit_count = 0;
- for (blk = 0; blk < AC3_MAX_BLOCKS; blk++) {
+ for (blk = 0; blk < s->num_blocks; blk++) {
AC3Block *block = &s->blocks[blk];
for (ch = !block->cpl_in_use; ch <= s->channels; ch++) {
int exp_strategy = s->exp_strategy[ch][blk];
cpl = (ch == CPL_CH);
group_size = exp_strategy + (exp_strategy == EXP_D45);
nb_groups = exponent_group_tab[cpl][exp_strategy-1][block->end_freq[ch]-s->start_freq[ch]];
- bit_count += 4 + (nb_groups * 7);
p = block->exp[ch] + s->start_freq[ch] - cpl;
/* DC exponent */
}
}
}
-
- s->exponent_bits = bit_count;
}
* Calculate final exponents from the supplied MDCT coefficients and exponent shift.
* Extract exponents from MDCT coefficients, calculate exponent strategies,
* and encode final exponents.
+ *
+ * @param s AC-3 encoder private context
*/
-static void process_exponents(AC3EncodeContext *s)
+void ff_ac3_process_exponents(AC3EncodeContext *s)
{
extract_exponents(s);
encode_exponents(s);
- group_exponents(s);
-
emms_c();
}
-/**
+/*
* Count frame bits that are based solely on fixed parameters.
* This only has to be run once when the encoder is initialized.
*/
* bit allocation parameters do not change between blocks
* no delta bit allocation
* no skipped data
- * no auxilliary data
+ * no auxiliary data
* no E-AC-3 metadata
*/
if (s->eac3) {
/* bitstream info header */
frame_bits += 35;
- frame_bits += 1 + 1 + 1;
+ frame_bits += 1 + 1;
+ if (s->num_blocks != 0x6)
+ frame_bits++;
+ frame_bits++;
/* audio frame header */
- frame_bits += 2;
+ if (s->num_blocks == 6)
+ frame_bits += 2;
frame_bits += 10;
/* exponent strategy */
- for (blk = 0; blk < AC3_MAX_BLOCKS; blk++)
- frame_bits += 2 * s->fbw_channels + s->lfe_on;
+ if (s->use_frame_exp_strategy)
+ frame_bits += 5 * s->fbw_channels;
+ else
+ frame_bits += s->num_blocks * 2 * s->fbw_channels;
+ if (s->lfe_on)
+ frame_bits += s->num_blocks;
/* converter exponent strategy */
- frame_bits += s->fbw_channels * 5;
+ if (s->num_blks_code != 0x3)
+ frame_bits++;
+ else
+ frame_bits += s->fbw_channels * 5;
/* snr offsets */
frame_bits += 10;
/* block start info */
- frame_bits++;
+ if (s->num_blocks != 1)
+ frame_bits++;
} else {
frame_bits += 49;
frame_bits += frame_bits_inc[s->channel_mode];
}
/* audio blocks */
- for (blk = 0; blk < AC3_MAX_BLOCKS; blk++) {
+ for (blk = 0; blk < s->num_blocks; blk++) {
if (!s->eac3) {
/* block switch flags */
frame_bits += s->fbw_channels;
}
-/**
+/*
* Initialize bit allocation.
* Set default parameter codes and calculate parameter values.
*/
-static void bit_alloc_init(AC3EncodeContext *s)
+static av_cold void bit_alloc_init(AC3EncodeContext *s)
{
int ch;
}
-/**
+/*
* Count the bits used to encode the frame, minus exponents and mantissas.
* Bits based on fixed parameters have already been counted, so now we just
* have to add the bits based on parameters that change during encoding.
/* header */
if (s->eac3) {
+ if (opt->eac3_mixing_metadata) {
+ if (s->channel_mode > AC3_CHMODE_STEREO)
+ frame_bits += 2;
+ if (s->has_center)
+ frame_bits += 6;
+ if (s->has_surround)
+ frame_bits += 6;
+ frame_bits += s->lfe_on;
+ frame_bits += 1 + 1 + 2;
+ if (s->channel_mode < AC3_CHMODE_STEREO)
+ frame_bits++;
+ frame_bits++;
+ }
+ if (opt->eac3_info_metadata) {
+ frame_bits += 3 + 1 + 1;
+ if (s->channel_mode == AC3_CHMODE_STEREO)
+ frame_bits += 2 + 2;
+ if (s->channel_mode >= AC3_CHMODE_2F2R)
+ frame_bits += 2;
+ frame_bits++;
+ if (opt->audio_production_info)
+ frame_bits += 5 + 2 + 1;
+ frame_bits++;
+ }
/* coupling */
if (s->channel_mode > AC3_CHMODE_MONO) {
frame_bits++;
- for (blk = 1; blk < AC3_MAX_BLOCKS; blk++) {
+ for (blk = 1; blk < s->num_blocks; blk++) {
AC3Block *block = &s->blocks[blk];
frame_bits++;
if (block->new_cpl_strategy)
}
}
/* coupling exponent strategy */
- for (blk = 0; blk < AC3_MAX_BLOCKS; blk++)
- frame_bits += 2 * s->blocks[blk].cpl_in_use;
+ if (s->cpl_on) {
+ if (s->use_frame_exp_strategy) {
+ frame_bits += 5 * s->cpl_on;
+ } else {
+ for (blk = 0; blk < s->num_blocks; blk++)
+ frame_bits += 2 * s->blocks[blk].cpl_in_use;
+ }
+ }
} else {
if (opt->audio_production_info)
frame_bits += 7;
}
/* audio blocks */
- for (blk = 0; blk < AC3_MAX_BLOCKS; blk++) {
+ for (blk = 0; blk < s->num_blocks; blk++) {
AC3Block *block = &s->blocks[blk];
/* coupling strategy */
if (block->cpl_in_use) {
for (ch = 1; ch <= s->fbw_channels; ch++) {
if (block->channel_in_cpl[ch]) {
- if (!s->eac3 || block->new_cpl_coords != 2)
+ if (!s->eac3 || block->new_cpl_coords[ch] != 2)
frame_bits++;
- if (block->new_cpl_coords) {
+ if (block->new_cpl_coords[ch]) {
frame_bits += 2;
frame_bits += (4 + 4) * s->num_cpl_bands;
}
}
-/**
+/*
* Calculate masking curve based on the final exponents.
* Also calculate the power spectral densities to use in future calculations.
*/
{
int blk, ch;
- for (blk = 0; blk < AC3_MAX_BLOCKS; blk++) {
+ for (blk = 0; blk < s->num_blocks; blk++) {
AC3Block *block = &s->blocks[blk];
for (ch = !block->cpl_in_use; ch <= s->channels; ch++) {
/* We only need psd and mask for calculating bap.
}
-/**
+/*
* Ensure that bap for each block and channel point to the current bap_buffer.
* They may have been switched during the bit allocation search.
*/
ref_bap = s->bap_buffer;
for (ch = 0; ch <= s->channels; ch++) {
- for (blk = 0; blk < AC3_MAX_BLOCKS; blk++)
+ for (blk = 0; blk < s->num_blocks; blk++)
s->ref_bap[ch][blk] = ref_bap + AC3_MAX_COEFS * s->exp_ref_block[ch][blk];
- ref_bap += AC3_MAX_COEFS * AC3_MAX_BLOCKS;
+ ref_bap += AC3_MAX_COEFS * s->num_blocks;
}
s->ref_bap_set = 1;
}
* Initialize mantissa counts.
* These are set so that they are padded to the next whole group size when bits
* are counted in compute_mantissa_size.
+ *
+ * @param[in,out] mant_cnt running counts for each bap value for each block
*/
static void count_mantissa_bits_init(uint16_t mant_cnt[AC3_MAX_BLOCKS][16])
{
/**
* Update mantissa bit counts for all blocks in 1 channel in a given bandwidth
* range.
+ *
+ * @param s AC-3 encoder private context
+ * @param ch channel index
+ * @param[in,out] mant_cnt running counts for each bap value for each block
+ * @param start starting coefficient bin
+ * @param end ending coefficient bin
*/
static void count_mantissa_bits_update_ch(AC3EncodeContext *s, int ch,
uint16_t mant_cnt[AC3_MAX_BLOCKS][16],
{
int blk;
- for (blk = 0; blk < AC3_MAX_BLOCKS; blk++) {
+ for (blk = 0; blk < s->num_blocks; blk++) {
AC3Block *block = &s->blocks[blk];
if (ch == CPL_CH && !block->cpl_in_use)
continue;
}
-/**
+/*
* Count the number of mantissa bits in the frame based on the bap values.
*/
static int count_mantissa_bits(AC3EncodeContext *s)
* Run the bit allocation with a given SNR offset.
* This calculates the bit allocation pointers that will be used to determine
* the quantization of each mantissa.
+ *
+ * @param s AC-3 encoder private context
+ * @param snr_offset SNR offset, 0 to 1023
* @return the number of bits needed for mantissas if the given SNR offset is
* is used.
*/
snr_offset = (snr_offset - 240) << 2;
reset_block_bap(s);
- for (blk = 0; blk < AC3_MAX_BLOCKS; blk++) {
+ for (blk = 0; blk < s->num_blocks; blk++) {
AC3Block *block = &s->blocks[blk];
for (ch = !block->cpl_in_use; ch <= s->channels; ch++) {
}
-/**
+/*
* Constant bitrate bit allocation search.
* Find the largest SNR offset that will allow data to fit in the frame.
*/
}
-/**
- * Downgrade exponent strategies to reduce the bits used by the exponents.
- * This is a fallback for when bit allocation fails with the normal exponent
- * strategies. Each time this function is run it only downgrades the
- * strategy in 1 channel of 1 block.
- * @return non-zero if downgrade was unsuccessful
- */
-static int downgrade_exponents(AC3EncodeContext *s)
-{
- int ch, blk;
-
- for (blk = AC3_MAX_BLOCKS-1; blk >= 0; blk--) {
- for (ch = !s->blocks[blk].cpl_in_use; ch <= s->fbw_channels; ch++) {
- if (s->exp_strategy[ch][blk] == EXP_D15) {
- s->exp_strategy[ch][blk] = EXP_D25;
- return 0;
- }
- }
- }
- for (blk = AC3_MAX_BLOCKS-1; blk >= 0; blk--) {
- for (ch = !s->blocks[blk].cpl_in_use; ch <= s->fbw_channels; ch++) {
- if (s->exp_strategy[ch][blk] == EXP_D25) {
- s->exp_strategy[ch][blk] = EXP_D45;
- return 0;
- }
- }
- }
- /* block 0 cannot reuse exponents, so only downgrade D45 to REUSE if
- the block number > 0 */
- for (blk = AC3_MAX_BLOCKS-1; blk > 0; blk--) {
- for (ch = !s->blocks[blk].cpl_in_use; ch <= s->fbw_channels; ch++) {
- if (s->exp_strategy[ch][blk] > EXP_REUSE) {
- s->exp_strategy[ch][blk] = EXP_REUSE;
- return 0;
- }
- }
- }
- return -1;
-}
-
-
-/**
+/*
* Perform bit allocation search.
* Finds the SNR offset value that maximizes quality and fits in the specified
* frame size. Output is the SNR offset and a set of bit allocation pointers
* used to quantize the mantissas.
*/
-static int compute_bit_allocation(AC3EncodeContext *s)
+int ff_ac3_compute_bit_allocation(AC3EncodeContext *s)
{
- int ret;
-
count_frame_bits(s);
- bit_alloc_masking(s);
+ s->exponent_bits = count_exponent_bits(s);
- ret = cbr_bit_allocation(s);
- while (ret) {
- /* fallback 1: disable channel coupling */
- if (s->cpl_on) {
- s->cpl_on = 0;
- compute_coupling_strategy(s);
- s->compute_rematrixing_strategy(s);
- apply_rematrixing(s);
- process_exponents(s);
- ret = compute_bit_allocation(s);
- continue;
- }
-
- /* fallback 2: downgrade exponents */
- if (!downgrade_exponents(s)) {
- extract_exponents(s);
- encode_exponents(s);
- group_exponents(s);
- ret = compute_bit_allocation(s);
- continue;
- }
-
- /* fallbacks were not enough... */
- break;
- }
+ bit_alloc_masking(s);
- return ret;
+ return cbr_bit_allocation(s);
}
/**
* Symmetric quantization on 'levels' levels.
+ *
+ * @param c unquantized coefficient
+ * @param e exponent
+ * @param levels number of quantization levels
+ * @return quantized coefficient
*/
static inline int sym_quant(int c, int e, int levels)
{
/**
* Asymmetric quantization on 2^qbits levels.
+ *
+ * @param c unquantized coefficient
+ * @param e exponent
+ * @param qbits number of quantization bits
+ * @return quantized coefficient
*/
static inline int asym_quant(int c, int e, int qbits)
{
- int lshift, m, v;
+ int m;
- lshift = e + qbits - 24;
- if (lshift >= 0)
- v = c << lshift;
- else
- v = c >> (-lshift);
- /* rounding */
- v = (v + 1) >> 1;
+ c = (((c << e) >> (24 - qbits)) + 1) >> 1;
m = (1 << (qbits-1));
- if (v >= m)
- v = m - 1;
- av_assert2(v >= -m);
- return v & ((1 << qbits)-1);
+ if (c >= m)
+ c = m - 1;
+ av_assert2(c >= -m);
+ return c;
}
/**
* Quantize a set of mantissas for a single channel in a single block.
+ *
+ * @param s Mantissa count context
+ * @param fixed_coef unquantized fixed-point coefficients
+ * @param exp exponents
+ * @param bap bit allocation pointer indices
+ * @param[out] qmant quantized coefficients
+ * @param start_freq starting coefficient bin
+ * @param end_freq ending coefficient bin
*/
static void quantize_mantissas_blk_ch(AC3Mant *s, int32_t *fixed_coef,
uint8_t *exp, uint8_t *bap,
- uint16_t *qmant, int start_freq,
+ int16_t *qmant, int start_freq,
int end_freq)
{
int i;
/**
* Quantize mantissas using coefficients, exponents, and bit allocation pointers.
+ *
+ * @param s AC-3 encoder private context
*/
-static void quantize_mantissas(AC3EncodeContext *s)
+void ff_ac3_quantize_mantissas(AC3EncodeContext *s)
{
int blk, ch, ch0=0, got_cpl;
- for (blk = 0; blk < AC3_MAX_BLOCKS; blk++) {
+ for (blk = 0; blk < s->num_blocks; blk++) {
AC3Block *block = &s->blocks[blk];
AC3Mant m = { 0 };
}
-/**
+/*
* Write the AC-3 frame header to the output bitstream.
*/
static void ac3_output_frame_header(AC3EncodeContext *s)
}
-/**
+/*
* Write one audio block to the output bitstream.
*/
static void output_audio_block(AC3EncodeContext *s, int blk)
{
- int ch, i, baie, bnd, got_cpl;
- int av_uninit(ch0);
+ int ch, i, baie, bnd, got_cpl, ch0;
AC3Block *block = &s->blocks[blk];
/* block switching */
if (block->cpl_in_use) {
for (ch = 1; ch <= s->fbw_channels; ch++) {
if (block->channel_in_cpl[ch]) {
- if (!s->eac3 || block->new_cpl_coords != 2)
- put_bits(&s->pb, 1, block->new_cpl_coords);
- if (block->new_cpl_coords) {
+ if (!s->eac3 || block->new_cpl_coords[ch] != 2)
+ put_bits(&s->pb, 1, block->new_cpl_coords[ch]);
+ if (block->new_cpl_coords[ch]) {
put_bits(&s->pb, 2, block->cpl_master_exp[ch]);
for (bnd = 0; bnd < s->num_cpl_bands; bnd++) {
put_bits(&s->pb, 4, block->cpl_coord_exp [ch][bnd]);
q = block->qmant[ch][i];
b = s->ref_bap[ch][blk][i];
switch (b) {
- case 0: break;
- case 1: if (q != 128) put_bits(&s->pb, 5, q); break;
- case 2: if (q != 128) put_bits(&s->pb, 7, q); break;
- case 3: put_bits(&s->pb, 3, q); break;
- case 4: if (q != 128) put_bits(&s->pb, 7, q); break;
- case 14: put_bits(&s->pb, 14, q); break;
- case 15: put_bits(&s->pb, 16, q); break;
- default: put_bits(&s->pb, b-1, q); break;
+ case 0: break;
+ case 1: if (q != 128) put_bits (&s->pb, 5, q); break;
+ case 2: if (q != 128) put_bits (&s->pb, 7, q); break;
+ case 3: put_sbits(&s->pb, 3, q); break;
+ case 4: if (q != 128) put_bits (&s->pb, 7, q); break;
+ case 14: put_sbits(&s->pb, 14, q); break;
+ case 15: put_sbits(&s->pb, 16, q); break;
+ default: put_sbits(&s->pb, b-1, q); break;
}
}
if (ch == CPL_CH)
}
-/**
+/*
* Fill the end of the frame with 0's and compute the two CRCs.
*/
static void output_frame_end(AC3EncodeContext *s)
/**
* Write the frame to the output bitstream.
+ *
+ * @param s AC-3 encoder private context
+ * @param frame output data buffer
*/
-static void output_frame(AC3EncodeContext *s, unsigned char *frame)
+void ff_ac3_output_frame(AC3EncodeContext *s, unsigned char *frame)
{
int blk;
s->output_frame_header(s);
- for (blk = 0; blk < AC3_MAX_BLOCKS; blk++)
+ for (blk = 0; blk < s->num_blocks; blk++)
output_audio_block(s, blk);
output_frame_end(s);
}
-static void dprint_options(AVCodecContext *avctx)
-{
#ifdef DEBUG
- AC3EncodeContext *s = avctx->priv_data;
+static void dprint_options(AC3EncodeContext *s)
+{
+ AVCodecContext *avctx = s->avctx;
AC3EncOptions *opt = &s->options;
char strbuf[32];
case 16: av_strlcpy(strbuf, "E-AC-3 (enhanced)", 32); break;
default: snprintf(strbuf, 32, "ERROR");
}
- av_dlog(avctx, "bitstream_id: %s (%d)\n", strbuf, s->bitstream_id);
- av_dlog(avctx, "sample_fmt: %s\n", av_get_sample_fmt_name(avctx->sample_fmt));
+ ff_dlog(avctx, "bitstream_id: %s (%d)\n", strbuf, s->bitstream_id);
+ ff_dlog(avctx, "sample_fmt: %s\n", av_get_sample_fmt_name(avctx->sample_fmt));
av_get_channel_layout_string(strbuf, 32, s->channels, avctx->channel_layout);
- av_dlog(avctx, "channel_layout: %s\n", strbuf);
- av_dlog(avctx, "sample_rate: %d\n", s->sample_rate);
- av_dlog(avctx, "bit_rate: %d\n", s->bit_rate);
+ ff_dlog(avctx, "channel_layout: %s\n", strbuf);
+ ff_dlog(avctx, "sample_rate: %d\n", s->sample_rate);
+ ff_dlog(avctx, "bit_rate: %d\n", s->bit_rate);
+ ff_dlog(avctx, "blocks/frame: %d (code=%d)\n", s->num_blocks, s->num_blks_code);
if (s->cutoff)
- av_dlog(avctx, "cutoff: %d\n", s->cutoff);
+ ff_dlog(avctx, "cutoff: %d\n", s->cutoff);
- av_dlog(avctx, "per_frame_metadata: %s\n",
+ ff_dlog(avctx, "per_frame_metadata: %s\n",
opt->allow_per_frame_metadata?"on":"off");
if (s->has_center)
- av_dlog(avctx, "center_mixlev: %0.3f (%d)\n", opt->center_mix_level,
+ ff_dlog(avctx, "center_mixlev: %0.3f (%d)\n", opt->center_mix_level,
s->center_mix_level);
else
- av_dlog(avctx, "center_mixlev: {not written}\n");
+ ff_dlog(avctx, "center_mixlev: {not written}\n");
if (s->has_surround)
- av_dlog(avctx, "surround_mixlev: %0.3f (%d)\n", opt->surround_mix_level,
+ ff_dlog(avctx, "surround_mixlev: %0.3f (%d)\n", opt->surround_mix_level,
s->surround_mix_level);
else
- av_dlog(avctx, "surround_mixlev: {not written}\n");
+ ff_dlog(avctx, "surround_mixlev: {not written}\n");
if (opt->audio_production_info) {
- av_dlog(avctx, "mixing_level: %ddB\n", opt->mixing_level);
+ ff_dlog(avctx, "mixing_level: %ddB\n", opt->mixing_level);
switch (opt->room_type) {
- case 0: av_strlcpy(strbuf, "notindicated", 32); break;
- case 1: av_strlcpy(strbuf, "large", 32); break;
- case 2: av_strlcpy(strbuf, "small", 32); break;
+ case AC3ENC_OPT_NOT_INDICATED: av_strlcpy(strbuf, "notindicated", 32); break;
+ case AC3ENC_OPT_LARGE_ROOM: av_strlcpy(strbuf, "large", 32); break;
+ case AC3ENC_OPT_SMALL_ROOM: av_strlcpy(strbuf, "small", 32); break;
default: snprintf(strbuf, 32, "ERROR (%d)", opt->room_type);
}
- av_dlog(avctx, "room_type: %s\n", strbuf);
+ ff_dlog(avctx, "room_type: %s\n", strbuf);
} else {
- av_dlog(avctx, "mixing_level: {not written}\n");
- av_dlog(avctx, "room_type: {not written}\n");
+ ff_dlog(avctx, "mixing_level: {not written}\n");
+ ff_dlog(avctx, "room_type: {not written}\n");
}
- av_dlog(avctx, "copyright: %s\n", opt->copyright?"on":"off");
- av_dlog(avctx, "dialnorm: %ddB\n", opt->dialogue_level);
+ ff_dlog(avctx, "copyright: %s\n", opt->copyright?"on":"off");
+ ff_dlog(avctx, "dialnorm: %ddB\n", opt->dialogue_level);
if (s->channel_mode == AC3_CHMODE_STEREO) {
switch (opt->dolby_surround_mode) {
- case 0: av_strlcpy(strbuf, "notindicated", 32); break;
- case 1: av_strlcpy(strbuf, "on", 32); break;
- case 2: av_strlcpy(strbuf, "off", 32); break;
+ case AC3ENC_OPT_NOT_INDICATED: av_strlcpy(strbuf, "notindicated", 32); break;
+ case AC3ENC_OPT_MODE_ON: av_strlcpy(strbuf, "on", 32); break;
+ case AC3ENC_OPT_MODE_OFF: av_strlcpy(strbuf, "off", 32); break;
default: snprintf(strbuf, 32, "ERROR (%d)", opt->dolby_surround_mode);
}
- av_dlog(avctx, "dsur_mode: %s\n", strbuf);
+ ff_dlog(avctx, "dsur_mode: %s\n", strbuf);
} else {
- av_dlog(avctx, "dsur_mode: {not written}\n");
+ ff_dlog(avctx, "dsur_mode: {not written}\n");
}
- av_dlog(avctx, "original: %s\n", opt->original?"on":"off");
+ ff_dlog(avctx, "original: %s\n", opt->original?"on":"off");
if (s->bitstream_id == 6) {
if (opt->extended_bsi_1) {
switch (opt->preferred_stereo_downmix) {
- case 0: av_strlcpy(strbuf, "notindicated", 32); break;
- case 1: av_strlcpy(strbuf, "ltrt", 32); break;
- case 2: av_strlcpy(strbuf, "loro", 32); break;
+ case AC3ENC_OPT_NOT_INDICATED: av_strlcpy(strbuf, "notindicated", 32); break;
+ case AC3ENC_OPT_DOWNMIX_LTRT: av_strlcpy(strbuf, "ltrt", 32); break;
+ case AC3ENC_OPT_DOWNMIX_LORO: av_strlcpy(strbuf, "loro", 32); break;
default: snprintf(strbuf, 32, "ERROR (%d)", opt->preferred_stereo_downmix);
}
- av_dlog(avctx, "dmix_mode: %s\n", strbuf);
- av_dlog(avctx, "ltrt_cmixlev: %0.3f (%d)\n",
+ ff_dlog(avctx, "dmix_mode: %s\n", strbuf);
+ ff_dlog(avctx, "ltrt_cmixlev: %0.3f (%d)\n",
opt->ltrt_center_mix_level, s->ltrt_center_mix_level);
- av_dlog(avctx, "ltrt_surmixlev: %0.3f (%d)\n",
+ ff_dlog(avctx, "ltrt_surmixlev: %0.3f (%d)\n",
opt->ltrt_surround_mix_level, s->ltrt_surround_mix_level);
- av_dlog(avctx, "loro_cmixlev: %0.3f (%d)\n",
+ ff_dlog(avctx, "loro_cmixlev: %0.3f (%d)\n",
opt->loro_center_mix_level, s->loro_center_mix_level);
- av_dlog(avctx, "loro_surmixlev: %0.3f (%d)\n",
+ ff_dlog(avctx, "loro_surmixlev: %0.3f (%d)\n",
opt->loro_surround_mix_level, s->loro_surround_mix_level);
} else {
- av_dlog(avctx, "extended bitstream info 1: {not written}\n");
+ ff_dlog(avctx, "extended bitstream info 1: {not written}\n");
}
if (opt->extended_bsi_2) {
switch (opt->dolby_surround_ex_mode) {
- case 0: av_strlcpy(strbuf, "notindicated", 32); break;
- case 1: av_strlcpy(strbuf, "on", 32); break;
- case 2: av_strlcpy(strbuf, "off", 32); break;
+ case AC3ENC_OPT_NOT_INDICATED: av_strlcpy(strbuf, "notindicated", 32); break;
+ case AC3ENC_OPT_MODE_ON: av_strlcpy(strbuf, "on", 32); break;
+ case AC3ENC_OPT_MODE_OFF: av_strlcpy(strbuf, "off", 32); break;
default: snprintf(strbuf, 32, "ERROR (%d)", opt->dolby_surround_ex_mode);
}
- av_dlog(avctx, "dsurex_mode: %s\n", strbuf);
+ ff_dlog(avctx, "dsurex_mode: %s\n", strbuf);
switch (opt->dolby_headphone_mode) {
- case 0: av_strlcpy(strbuf, "notindicated", 32); break;
- case 1: av_strlcpy(strbuf, "on", 32); break;
- case 2: av_strlcpy(strbuf, "off", 32); break;
+ case AC3ENC_OPT_NOT_INDICATED: av_strlcpy(strbuf, "notindicated", 32); break;
+ case AC3ENC_OPT_MODE_ON: av_strlcpy(strbuf, "on", 32); break;
+ case AC3ENC_OPT_MODE_OFF: av_strlcpy(strbuf, "off", 32); break;
default: snprintf(strbuf, 32, "ERROR (%d)", opt->dolby_headphone_mode);
}
- av_dlog(avctx, "dheadphone_mode: %s\n", strbuf);
+ ff_dlog(avctx, "dheadphone_mode: %s\n", strbuf);
switch (opt->ad_converter_type) {
- case 0: av_strlcpy(strbuf, "standard", 32); break;
- case 1: av_strlcpy(strbuf, "hdcd", 32); break;
+ case AC3ENC_OPT_ADCONV_STANDARD: av_strlcpy(strbuf, "standard", 32); break;
+ case AC3ENC_OPT_ADCONV_HDCD: av_strlcpy(strbuf, "hdcd", 32); break;
default: snprintf(strbuf, 32, "ERROR (%d)", opt->ad_converter_type);
}
- av_dlog(avctx, "ad_conv_type: %s\n", strbuf);
+ ff_dlog(avctx, "ad_conv_type: %s\n", strbuf);
} else {
- av_dlog(avctx, "extended bitstream info 2: {not written}\n");
+ ff_dlog(avctx, "extended bitstream info 2: {not written}\n");
}
}
-#endif
}
+#else
+#define dprint_options(x) do {} while(0)
+#endif
#define FLT_OPTION_THRESHOLD 0.01
/**
* Validate metadata options as set by AVOption system.
* These values can optionally be changed per-frame.
+ *
+ * @param s AC-3 encoder private context
*/
-static int validate_metadata(AVCodecContext *avctx)
+int ff_ac3_validate_metadata(AC3EncodeContext *s)
{
- AC3EncodeContext *s = avctx->priv_data;
+ AVCodecContext *avctx = s->avctx;
AC3EncOptions *opt = &s->options;
- /* validate mixing levels */
- if (s->has_center) {
- validate_mix_level(avctx, "center_mix_level", &opt->center_mix_level,
- cmixlev_options, CMIXLEV_NUM_OPTIONS, 1, 0,
- &s->center_mix_level);
+ opt->audio_production_info = 0;
+ opt->extended_bsi_1 = 0;
+ opt->extended_bsi_2 = 0;
+ opt->eac3_mixing_metadata = 0;
+ opt->eac3_info_metadata = 0;
+
+ /* determine mixing metadata / xbsi1 use */
+ if (s->channel_mode > AC3_CHMODE_STEREO && opt->preferred_stereo_downmix != AC3ENC_OPT_NONE) {
+ opt->extended_bsi_1 = 1;
+ opt->eac3_mixing_metadata = 1;
+ }
+ if (s->has_center &&
+ (opt->ltrt_center_mix_level >= 0 || opt->loro_center_mix_level >= 0)) {
+ opt->extended_bsi_1 = 1;
+ opt->eac3_mixing_metadata = 1;
+ }
+ if (s->has_surround &&
+ (opt->ltrt_surround_mix_level >= 0 || opt->loro_surround_mix_level >= 0)) {
+ opt->extended_bsi_1 = 1;
+ opt->eac3_mixing_metadata = 1;
+ }
+
+ if (s->eac3) {
+ /* determine info metadata use */
+ if (avctx->audio_service_type != AV_AUDIO_SERVICE_TYPE_MAIN)
+ opt->eac3_info_metadata = 1;
+ if (opt->copyright != AC3ENC_OPT_NONE || opt->original != AC3ENC_OPT_NONE)
+ opt->eac3_info_metadata = 1;
+ if (s->channel_mode == AC3_CHMODE_STEREO &&
+ (opt->dolby_headphone_mode != AC3ENC_OPT_NONE || opt->dolby_surround_mode != AC3ENC_OPT_NONE))
+ opt->eac3_info_metadata = 1;
+ if (s->channel_mode >= AC3_CHMODE_2F2R && opt->dolby_surround_ex_mode != AC3ENC_OPT_NONE)
+ opt->eac3_info_metadata = 1;
+ if (opt->mixing_level != AC3ENC_OPT_NONE || opt->room_type != AC3ENC_OPT_NONE ||
+ opt->ad_converter_type != AC3ENC_OPT_NONE) {
+ opt->audio_production_info = 1;
+ opt->eac3_info_metadata = 1;
+ }
+ } else {
+ /* determine audio production info use */
+ if (opt->mixing_level != AC3ENC_OPT_NONE || opt->room_type != AC3ENC_OPT_NONE)
+ opt->audio_production_info = 1;
+
+ /* determine xbsi2 use */
+ if (s->channel_mode >= AC3_CHMODE_2F2R && opt->dolby_surround_ex_mode != AC3ENC_OPT_NONE)
+ opt->extended_bsi_2 = 1;
+ if (s->channel_mode == AC3_CHMODE_STEREO && opt->dolby_headphone_mode != AC3ENC_OPT_NONE)
+ opt->extended_bsi_2 = 1;
+ if (opt->ad_converter_type != AC3ENC_OPT_NONE)
+ opt->extended_bsi_2 = 1;
}
- if (s->has_surround) {
- validate_mix_level(avctx, "surround_mix_level", &opt->surround_mix_level,
- surmixlev_options, SURMIXLEV_NUM_OPTIONS, 1, 0,
- &s->surround_mix_level);
+
+ /* validate AC-3 mixing levels */
+ if (!s->eac3) {
+ if (s->has_center) {
+ validate_mix_level(avctx, "center_mix_level", &opt->center_mix_level,
+ cmixlev_options, CMIXLEV_NUM_OPTIONS, 1, 0,
+ &s->center_mix_level);
+ }
+ if (s->has_surround) {
+ validate_mix_level(avctx, "surround_mix_level", &opt->surround_mix_level,
+ surmixlev_options, SURMIXLEV_NUM_OPTIONS, 1, 0,
+ &s->surround_mix_level);
+ }
+ }
+
+ /* validate extended bsi 1 / mixing metadata */
+ if (opt->extended_bsi_1 || opt->eac3_mixing_metadata) {
+ /* default preferred stereo downmix */
+ if (opt->preferred_stereo_downmix == AC3ENC_OPT_NONE)
+ opt->preferred_stereo_downmix = AC3ENC_OPT_NOT_INDICATED;
+ if (!s->eac3 || s->has_center) {
+ /* validate Lt/Rt center mix level */
+ validate_mix_level(avctx, "ltrt_center_mix_level",
+ &opt->ltrt_center_mix_level, extmixlev_options,
+ EXTMIXLEV_NUM_OPTIONS, 5, 0,
+ &s->ltrt_center_mix_level);
+ /* validate Lo/Ro center mix level */
+ validate_mix_level(avctx, "loro_center_mix_level",
+ &opt->loro_center_mix_level, extmixlev_options,
+ EXTMIXLEV_NUM_OPTIONS, 5, 0,
+ &s->loro_center_mix_level);
+ }
+ if (!s->eac3 || s->has_surround) {
+ /* validate Lt/Rt surround mix level */
+ validate_mix_level(avctx, "ltrt_surround_mix_level",
+ &opt->ltrt_surround_mix_level, extmixlev_options,
+ EXTMIXLEV_NUM_OPTIONS, 6, 3,
+ &s->ltrt_surround_mix_level);
+ /* validate Lo/Ro surround mix level */
+ validate_mix_level(avctx, "loro_surround_mix_level",
+ &opt->loro_surround_mix_level, extmixlev_options,
+ EXTMIXLEV_NUM_OPTIONS, 6, 3,
+ &s->loro_surround_mix_level);
+ }
}
- /* set audio production info flag */
- if (opt->mixing_level >= 0 || opt->room_type >= 0) {
- if (opt->mixing_level < 0) {
+ /* validate audio service type / channels combination */
+ if ((avctx->audio_service_type == AV_AUDIO_SERVICE_TYPE_KARAOKE &&
+ avctx->channels == 1) ||
+ ((avctx->audio_service_type == AV_AUDIO_SERVICE_TYPE_COMMENTARY ||
+ avctx->audio_service_type == AV_AUDIO_SERVICE_TYPE_EMERGENCY ||
+ avctx->audio_service_type == AV_AUDIO_SERVICE_TYPE_VOICE_OVER)
+ && avctx->channels > 1)) {
+ av_log(avctx, AV_LOG_ERROR, "invalid audio service type for the "
+ "specified number of channels\n");
+ return AVERROR(EINVAL);
+ }
+
+ /* validate extended bsi 2 / info metadata */
+ if (opt->extended_bsi_2 || opt->eac3_info_metadata) {
+ /* default dolby headphone mode */
+ if (opt->dolby_headphone_mode == AC3ENC_OPT_NONE)
+ opt->dolby_headphone_mode = AC3ENC_OPT_NOT_INDICATED;
+ /* default dolby surround ex mode */
+ if (opt->dolby_surround_ex_mode == AC3ENC_OPT_NONE)
+ opt->dolby_surround_ex_mode = AC3ENC_OPT_NOT_INDICATED;
+ /* default A/D converter type */
+ if (opt->ad_converter_type == AC3ENC_OPT_NONE)
+ opt->ad_converter_type = AC3ENC_OPT_ADCONV_STANDARD;
+ }
+
+ /* copyright & original defaults */
+ if (!s->eac3 || opt->eac3_info_metadata) {
+ /* default copyright */
+ if (opt->copyright == AC3ENC_OPT_NONE)
+ opt->copyright = AC3ENC_OPT_OFF;
+ /* default original */
+ if (opt->original == AC3ENC_OPT_NONE)
+ opt->original = AC3ENC_OPT_ON;
+ }
+
+ /* dolby surround mode default */
+ if (!s->eac3 || opt->eac3_info_metadata) {
+ if (opt->dolby_surround_mode == AC3ENC_OPT_NONE)
+ opt->dolby_surround_mode = AC3ENC_OPT_NOT_INDICATED;
+ }
+
+ /* validate audio production info */
+ if (opt->audio_production_info) {
+ if (opt->mixing_level == AC3ENC_OPT_NONE) {
av_log(avctx, AV_LOG_ERROR, "mixing_level must be set if "
"room_type is set\n");
return AVERROR(EINVAL);
return AVERROR(EINVAL);
}
/* default room type */
- if (opt->room_type < 0)
- opt->room_type = 0;
- opt->audio_production_info = 1;
- } else {
- opt->audio_production_info = 0;
- }
-
- /* set extended bsi 1 flag */
- if ((s->has_center || s->has_surround) &&
- (opt->preferred_stereo_downmix >= 0 ||
- opt->ltrt_center_mix_level >= 0 ||
- opt->ltrt_surround_mix_level >= 0 ||
- opt->loro_center_mix_level >= 0 ||
- opt->loro_surround_mix_level >= 0)) {
- /* default preferred stereo downmix */
- if (opt->preferred_stereo_downmix < 0)
- opt->preferred_stereo_downmix = 0;
- /* validate Lt/Rt center mix level */
- validate_mix_level(avctx, "ltrt_center_mix_level",
- &opt->ltrt_center_mix_level, extmixlev_options,
- EXTMIXLEV_NUM_OPTIONS, 5, 0,
- &s->ltrt_center_mix_level);
- /* validate Lt/Rt surround mix level */
- validate_mix_level(avctx, "ltrt_surround_mix_level",
- &opt->ltrt_surround_mix_level, extmixlev_options,
- EXTMIXLEV_NUM_OPTIONS, 6, 3,
- &s->ltrt_surround_mix_level);
- /* validate Lo/Ro center mix level */
- validate_mix_level(avctx, "loro_center_mix_level",
- &opt->loro_center_mix_level, extmixlev_options,
- EXTMIXLEV_NUM_OPTIONS, 5, 0,
- &s->loro_center_mix_level);
- /* validate Lo/Ro surround mix level */
- validate_mix_level(avctx, "loro_surround_mix_level",
- &opt->loro_surround_mix_level, extmixlev_options,
- EXTMIXLEV_NUM_OPTIONS, 6, 3,
- &s->loro_surround_mix_level);
- opt->extended_bsi_1 = 1;
- } else {
- opt->extended_bsi_1 = 0;
- }
-
- /* set extended bsi 2 flag */
- if (opt->dolby_surround_ex_mode >= 0 ||
- opt->dolby_headphone_mode >= 0 ||
- opt->ad_converter_type >= 0) {
- /* default dolby surround ex mode */
- if (opt->dolby_surround_ex_mode < 0)
- opt->dolby_surround_ex_mode = 0;
- /* default dolby headphone mode */
- if (opt->dolby_headphone_mode < 0)
- opt->dolby_headphone_mode = 0;
- /* default A/D converter type */
- if (opt->ad_converter_type < 0)
- opt->ad_converter_type = 0;
- opt->extended_bsi_2 = 1;
- } else {
- opt->extended_bsi_2 = 0;
+ if (opt->room_type == AC3ENC_OPT_NONE)
+ opt->room_type = AC3ENC_OPT_NOT_INDICATED;
}
/* set bitstream id for alternate bitstream syntax */
- if (opt->extended_bsi_1 || opt->extended_bsi_2) {
+ if (!s->eac3 && (opt->extended_bsi_1 || opt->extended_bsi_2)) {
if (s->bitstream_id > 8 && s->bitstream_id < 11) {
static int warn_once = 1;
if (warn_once) {
}
-/**
- * Encode a single AC-3 frame.
- */
-int ff_ac3_encode_frame(AVCodecContext *avctx, unsigned char *frame,
- int buf_size, void *data)
-{
- AC3EncodeContext *s = avctx->priv_data;
- const SampleType *samples = data;
- int ret;
-
- if (!s->eac3 && s->options.allow_per_frame_metadata) {
- ret = validate_metadata(avctx);
- if (ret)
- return ret;
- }
-
- if (s->bit_alloc.sr_code == 1 || s->eac3)
- adjust_frame_size(s);
-
- s->deinterleave_input_samples(s, samples);
-
- s->apply_mdct(s);
-
- s->scale_coefficients(s);
-
- s->cpl_on = s->cpl_enabled;
- compute_coupling_strategy(s);
-
- if (s->cpl_on)
- s->apply_channel_coupling(s);
-
- s->compute_rematrixing_strategy(s);
-
- apply_rematrixing(s);
-
- process_exponents(s);
-
- ret = compute_bit_allocation(s);
- if (ret) {
- av_log(avctx, AV_LOG_ERROR, "Bit allocation failed. Try increasing the bitrate.\n");
- return ret;
- }
-
- quantize_mantissas(s);
-
- output_frame(s, frame);
-
- return s->frame_size;
-}
-
-
/**
* Finalize encoding and free any memory allocated by the encoder.
+ *
+ * @param avctx Codec context
*/
av_cold int ff_ac3_encode_close(AVCodecContext *avctx)
{
av_freep(&s->band_psd_buffer);
av_freep(&s->mask_buffer);
av_freep(&s->qmant_buffer);
- for (blk = 0; blk < AC3_MAX_BLOCKS; blk++) {
+ av_freep(&s->cpl_coord_exp_buffer);
+ av_freep(&s->cpl_coord_mant_buffer);
+ for (blk = 0; blk < s->num_blocks; blk++) {
AC3Block *block = &s->blocks[blk];
av_freep(&block->mdct_coef);
av_freep(&block->fixed_coef);
av_freep(&block->band_psd);
av_freep(&block->mask);
av_freep(&block->qmant);
+ av_freep(&block->cpl_coord_exp);
+ av_freep(&block->cpl_coord_mant);
}
- s->mdct_end(s->mdct);
- av_freep(&s->mdct);
+ s->mdct_end(s);
- av_freep(&avctx->coded_frame);
return 0;
}
-/**
+/*
* Set channel information during initialization.
*/
static av_cold int set_channel_info(AC3EncodeContext *s, int channels,
- int64_t *channel_layout)
+ uint64_t *channel_layout)
{
int ch_layout;
if (channels < 1 || channels > AC3_MAX_CHANNELS)
return AVERROR(EINVAL);
- if ((uint64_t)*channel_layout > 0x7FF)
+ if (*channel_layout > 0x7FF)
return AVERROR(EINVAL);
ch_layout = *channel_layout;
if (!ch_layout)
- ch_layout = avcodec_guess_channel_layout(channels, CODEC_ID_AC3, NULL);
+ ch_layout = av_get_default_channel_layout(channels);
s->lfe_on = !!(ch_layout & AV_CH_LOW_FREQUENCY);
s->channels = channels;
}
-static av_cold int validate_options(AVCodecContext *avctx, AC3EncodeContext *s)
+static av_cold int validate_options(AC3EncodeContext *s)
{
+ AVCodecContext *avctx = s->avctx;
int i, ret, max_sr;
/* validate channel layout */
s->bit_alloc.sr_code = i % 3;
s->bitstream_id = s->eac3 ? 16 : 8 + s->bit_alloc.sr_shift;
+ /* select a default bit rate if not set by the user */
+ if (!avctx->bit_rate) {
+ switch (s->fbw_channels) {
+ case 1: avctx->bit_rate = 96000; break;
+ case 2: avctx->bit_rate = 192000; break;
+ case 3: avctx->bit_rate = 320000; break;
+ case 4: avctx->bit_rate = 384000; break;
+ case 5: avctx->bit_rate = 448000; break;
+ }
+ }
+
/* validate bit rate */
if (s->eac3) {
int max_br, min_br, wpf, min_br_dist, min_br_code;
+ int num_blks_code, num_blocks, frame_samples;
/* calculate min/max bitrate */
- max_br = 2048 * s->sample_rate / AC3_FRAME_SIZE * 16;
- min_br = ((s->sample_rate + (AC3_FRAME_SIZE-1)) / AC3_FRAME_SIZE) * 16;
+ /* TODO: More testing with 3 and 2 blocks. All E-AC-3 samples I've
+ found use either 6 blocks or 1 block, even though 2 or 3 blocks
+ would work as far as the bit rate is concerned. */
+ for (num_blks_code = 3; num_blks_code >= 0; num_blks_code--) {
+ num_blocks = ((int[]){ 1, 2, 3, 6 })[num_blks_code];
+ frame_samples = AC3_BLOCK_SIZE * num_blocks;
+ max_br = 2048 * s->sample_rate / frame_samples * 16;
+ min_br = ((s->sample_rate + (frame_samples-1)) / frame_samples) * 16;
+ if (avctx->bit_rate <= max_br)
+ break;
+ }
if (avctx->bit_rate < min_br || avctx->bit_rate > max_br) {
av_log(avctx, AV_LOG_ERROR, "invalid bit rate. must be %d to %d "
"for this sample rate\n", min_br, max_br);
return AVERROR(EINVAL);
}
+ s->num_blks_code = num_blks_code;
+ s->num_blocks = num_blocks;
/* calculate words-per-frame for the selected bitrate */
- wpf = (avctx->bit_rate / 16) * AC3_FRAME_SIZE / s->sample_rate;
+ wpf = (avctx->bit_rate / 16) * frame_samples / s->sample_rate;
av_assert1(wpf > 0 && wpf <= 2048);
/* find the closest AC-3 bitrate code to the selected bitrate.
wpf--;
s->frame_size_min = 2 * wpf;
} else {
+ int best_br = 0, best_code = 0, best_diff = INT_MAX;
for (i = 0; i < 19; i++) {
- if ((ff_ac3_bitrate_tab[i] >> s->bit_alloc.sr_shift)*1000 == avctx->bit_rate)
+ int br = (ff_ac3_bitrate_tab[i] >> s->bit_alloc.sr_shift) * 1000;
+ int diff = abs(br - avctx->bit_rate);
+ if (diff < best_diff) {
+ best_br = br;
+ best_code = i;
+ best_diff = diff;
+ }
+ if (!best_diff)
break;
}
- if (i == 19) {
- av_log(avctx, AV_LOG_ERROR, "invalid bit rate\n");
- return AVERROR(EINVAL);
- }
- s->frame_size_code = i << 1;
+ avctx->bit_rate = best_br;
+ s->frame_size_code = best_code << 1;
s->frame_size_min = 2 * ff_ac3_frame_size_tab[s->frame_size_code][s->bit_alloc.sr_code];
+ s->num_blks_code = 0x3;
+ s->num_blocks = 6;
}
s->bit_rate = avctx->bit_rate;
s->frame_size = s->frame_size_min;
if (s->cutoff > (s->sample_rate >> 1))
s->cutoff = s->sample_rate >> 1;
- /* validate audio service type / channels combination */
- if ((avctx->audio_service_type == AV_AUDIO_SERVICE_TYPE_KARAOKE &&
- avctx->channels == 1) ||
- ((avctx->audio_service_type == AV_AUDIO_SERVICE_TYPE_COMMENTARY ||
- avctx->audio_service_type == AV_AUDIO_SERVICE_TYPE_EMERGENCY ||
- avctx->audio_service_type == AV_AUDIO_SERVICE_TYPE_VOICE_OVER)
- && avctx->channels > 1)) {
- av_log(avctx, AV_LOG_ERROR, "invalid audio service type for the "
- "specified number of channels\n");
- return AVERROR(EINVAL);
- }
-
- if (!s->eac3) {
- ret = validate_metadata(avctx);
- if (ret)
- return ret;
- }
+ ret = ff_ac3_validate_metadata(s);
+ if (ret)
+ return ret;
s->rematrixing_enabled = s->options.stereo_rematrixing &&
(s->channel_mode == AC3_CHMODE_STEREO);
s->cpl_enabled = s->options.channel_coupling &&
- s->channel_mode >= AC3_CHMODE_STEREO && !s->fixed_point;
+ s->channel_mode >= AC3_CHMODE_STEREO;
return 0;
}
-/**
+/*
* Set bandwidth for all channels.
* The user can optionally supply a cutoff frequency. Otherwise an appropriate
* default value will be used.
*/
static av_cold void set_bandwidth(AC3EncodeContext *s)
{
- int blk, ch;
- int av_uninit(cpl_start);
+ int blk, ch, cpl_start;
if (s->cutoff) {
/* calculate bandwidth based on user-specified cutoff frequency */
/* set number of coefficients for each channel */
for (ch = 1; ch <= s->fbw_channels; ch++) {
s->start_freq[ch] = 0;
- for (blk = 0; blk < AC3_MAX_BLOCKS; blk++)
+ for (blk = 0; blk < s->num_blocks; blk++)
s->blocks[blk].end_freq[ch] = s->bandwidth_code * 3 + 73;
}
/* LFE channel always has 7 coefs */
if (s->lfe_on) {
s->start_freq[s->lfe_channel] = 0;
- for (blk = 0; blk < AC3_MAX_BLOCKS; blk++)
+ for (blk = 0; blk < s->num_blocks; blk++)
s->blocks[blk].end_freq[ch] = 7;
}
/* initialize coupling strategy */
if (s->cpl_enabled) {
- if (s->options.cpl_start >= 0) {
+ if (s->options.cpl_start != AC3ENC_OPT_AUTO) {
cpl_start = s->options.cpl_start;
} else {
cpl_start = ac3_coupling_start_tab[s->channel_mode-2][s->bit_alloc.sr_code][s->frame_size_code/2];
- if (cpl_start < 0)
- s->cpl_enabled = 0;
+ if (cpl_start < 0) {
+ if (s->options.channel_coupling == AC3ENC_OPT_AUTO)
+ s->cpl_enabled = 0;
+ else
+ cpl_start = 15;
+ }
}
}
if (s->cpl_enabled) {
s->start_freq[CPL_CH] = cpl_start_band * 12 + 37;
s->cpl_end_freq = cpl_end_band * 12 + 37;
- for (blk = 0; blk < AC3_MAX_BLOCKS; blk++)
+ for (blk = 0; blk < s->num_blocks; blk++)
s->blocks[blk].end_freq[CPL_CH] = s->cpl_end_freq;
}
}
-static av_cold int allocate_buffers(AVCodecContext *avctx)
+static av_cold int allocate_buffers(AC3EncodeContext *s)
{
+ AVCodecContext *avctx = s->avctx;
int blk, ch;
- AC3EncodeContext *s = avctx->priv_data;
int channels = s->channels + 1; /* includes coupling channel */
-
- FF_ALLOC_OR_GOTO(avctx, s->windowed_samples, AC3_WINDOW_SIZE *
- sizeof(*s->windowed_samples), alloc_fail);
- FF_ALLOC_OR_GOTO(avctx, s->planar_samples, s->channels * sizeof(*s->planar_samples),
- alloc_fail);
- for (ch = 0; ch < s->channels; ch++) {
- FF_ALLOCZ_OR_GOTO(avctx, s->planar_samples[ch],
- (AC3_FRAME_SIZE+AC3_BLOCK_SIZE) * sizeof(**s->planar_samples),
- alloc_fail);
- }
- FF_ALLOC_OR_GOTO(avctx, s->bap_buffer, AC3_MAX_BLOCKS * channels *
- AC3_MAX_COEFS * sizeof(*s->bap_buffer), alloc_fail);
- FF_ALLOC_OR_GOTO(avctx, s->bap1_buffer, AC3_MAX_BLOCKS * channels *
- AC3_MAX_COEFS * sizeof(*s->bap1_buffer), alloc_fail);
- FF_ALLOCZ_OR_GOTO(avctx, s->mdct_coef_buffer, AC3_MAX_BLOCKS * channels *
- AC3_MAX_COEFS * sizeof(*s->mdct_coef_buffer), alloc_fail);
- FF_ALLOC_OR_GOTO(avctx, s->exp_buffer, AC3_MAX_BLOCKS * channels *
- AC3_MAX_COEFS * sizeof(*s->exp_buffer), alloc_fail);
- FF_ALLOC_OR_GOTO(avctx, s->grouped_exp_buffer, AC3_MAX_BLOCKS * channels *
- 128 * sizeof(*s->grouped_exp_buffer), alloc_fail);
- FF_ALLOC_OR_GOTO(avctx, s->psd_buffer, AC3_MAX_BLOCKS * channels *
- AC3_MAX_COEFS * sizeof(*s->psd_buffer), alloc_fail);
- FF_ALLOC_OR_GOTO(avctx, s->band_psd_buffer, AC3_MAX_BLOCKS * channels *
- 64 * sizeof(*s->band_psd_buffer), alloc_fail);
- FF_ALLOC_OR_GOTO(avctx, s->mask_buffer, AC3_MAX_BLOCKS * channels *
- 64 * sizeof(*s->mask_buffer), alloc_fail);
- FF_ALLOC_OR_GOTO(avctx, s->qmant_buffer, AC3_MAX_BLOCKS * channels *
- AC3_MAX_COEFS * sizeof(*s->qmant_buffer), alloc_fail);
+ int channel_blocks = channels * s->num_blocks;
+ int total_coefs = AC3_MAX_COEFS * channel_blocks;
+
+ if (s->allocate_sample_buffers(s))
+ goto alloc_fail;
+
+ FF_ALLOC_OR_GOTO(avctx, s->bap_buffer, total_coefs *
+ sizeof(*s->bap_buffer), alloc_fail);
+ FF_ALLOC_OR_GOTO(avctx, s->bap1_buffer, total_coefs *
+ sizeof(*s->bap1_buffer), alloc_fail);
+ FF_ALLOCZ_OR_GOTO(avctx, s->mdct_coef_buffer, total_coefs *
+ sizeof(*s->mdct_coef_buffer), alloc_fail);
+ FF_ALLOC_OR_GOTO(avctx, s->exp_buffer, total_coefs *
+ sizeof(*s->exp_buffer), alloc_fail);
+ FF_ALLOC_OR_GOTO(avctx, s->grouped_exp_buffer, channel_blocks * 128 *
+ sizeof(*s->grouped_exp_buffer), alloc_fail);
+ FF_ALLOC_OR_GOTO(avctx, s->psd_buffer, total_coefs *
+ sizeof(*s->psd_buffer), alloc_fail);
+ FF_ALLOC_OR_GOTO(avctx, s->band_psd_buffer, channel_blocks * 64 *
+ sizeof(*s->band_psd_buffer), alloc_fail);
+ FF_ALLOC_OR_GOTO(avctx, s->mask_buffer, channel_blocks * 64 *
+ sizeof(*s->mask_buffer), alloc_fail);
+ FF_ALLOC_OR_GOTO(avctx, s->qmant_buffer, total_coefs *
+ sizeof(*s->qmant_buffer), alloc_fail);
if (s->cpl_enabled) {
- FF_ALLOC_OR_GOTO(avctx, s->cpl_coord_exp_buffer, AC3_MAX_BLOCKS * channels *
- 16 * sizeof(*s->cpl_coord_exp_buffer), alloc_fail);
- FF_ALLOC_OR_GOTO(avctx, s->cpl_coord_mant_buffer, AC3_MAX_BLOCKS * channels *
- 16 * sizeof(*s->cpl_coord_mant_buffer), alloc_fail);
+ FF_ALLOC_OR_GOTO(avctx, s->cpl_coord_exp_buffer, channel_blocks * 16 *
+ sizeof(*s->cpl_coord_exp_buffer), alloc_fail);
+ FF_ALLOC_OR_GOTO(avctx, s->cpl_coord_mant_buffer, channel_blocks * 16 *
+ sizeof(*s->cpl_coord_mant_buffer), alloc_fail);
}
- for (blk = 0; blk < AC3_MAX_BLOCKS; blk++) {
+ for (blk = 0; blk < s->num_blocks; blk++) {
AC3Block *block = &s->blocks[blk];
FF_ALLOCZ_OR_GOTO(avctx, block->mdct_coef, channels * sizeof(*block->mdct_coef),
alloc_fail);
}
/* arrangement: channel, block, coeff */
- block->exp[ch] = &s->exp_buffer [AC3_MAX_COEFS * (AC3_MAX_BLOCKS * ch + blk)];
- block->mdct_coef[ch] = &s->mdct_coef_buffer [AC3_MAX_COEFS * (AC3_MAX_BLOCKS * ch + blk)];
+ block->exp[ch] = &s->exp_buffer [AC3_MAX_COEFS * (s->num_blocks * ch + blk)];
+ block->mdct_coef[ch] = &s->mdct_coef_buffer [AC3_MAX_COEFS * (s->num_blocks * ch + blk)];
}
}
if (!s->fixed_point) {
- FF_ALLOCZ_OR_GOTO(avctx, s->fixed_coef_buffer, AC3_MAX_BLOCKS * channels *
- AC3_MAX_COEFS * sizeof(*s->fixed_coef_buffer), alloc_fail);
- for (blk = 0; blk < AC3_MAX_BLOCKS; blk++) {
+ FF_ALLOCZ_OR_GOTO(avctx, s->fixed_coef_buffer, total_coefs *
+ sizeof(*s->fixed_coef_buffer), alloc_fail);
+ for (blk = 0; blk < s->num_blocks; blk++) {
AC3Block *block = &s->blocks[blk];
FF_ALLOCZ_OR_GOTO(avctx, block->fixed_coef, channels *
sizeof(*block->fixed_coef), alloc_fail);
for (ch = 0; ch < channels; ch++)
- block->fixed_coef[ch] = &s->fixed_coef_buffer[AC3_MAX_COEFS * (AC3_MAX_BLOCKS * ch + blk)];
+ block->fixed_coef[ch] = &s->fixed_coef_buffer[AC3_MAX_COEFS * (s->num_blocks * ch + blk)];
}
} else {
- for (blk = 0; blk < AC3_MAX_BLOCKS; blk++) {
+ for (blk = 0; blk < s->num_blocks; blk++) {
AC3Block *block = &s->blocks[blk];
FF_ALLOCZ_OR_GOTO(avctx, block->fixed_coef, channels *
sizeof(*block->fixed_coef), alloc_fail);
}
-/**
- * Initialize the encoder.
- */
av_cold int ff_ac3_encode_init(AVCodecContext *avctx)
{
AC3EncodeContext *s = avctx->priv_data;
int ret, frame_size_58;
- s->eac3 = avctx->codec_id == CODEC_ID_EAC3;
+ s->avctx = avctx;
- avctx->frame_size = AC3_FRAME_SIZE;
+ s->eac3 = avctx->codec_id == AV_CODEC_ID_EAC3;
ff_ac3_common_init();
- ret = validate_options(avctx, s);
+ ret = validate_options(s);
if (ret)
return ret;
+ avctx->frame_size = AC3_BLOCK_SIZE * s->num_blocks;
+ avctx->initial_padding = AC3_BLOCK_SIZE;
+
s->bitstream_mode = avctx->audio_service_type;
if (s->bitstream_mode == AV_AUDIO_SERVICE_TYPE_KARAOKE)
s->bitstream_mode = 0x7;
if (CONFIG_AC3_FIXED_ENCODER && s->fixed_point) {
s->mdct_end = ff_ac3_fixed_mdct_end;
s->mdct_init = ff_ac3_fixed_mdct_init;
- s->apply_window = ff_ac3_fixed_apply_window;
- s->normalize_samples = ff_ac3_fixed_normalize_samples;
- s->scale_coefficients = ff_ac3_fixed_scale_coefficients;
- s->deinterleave_input_samples = ff_ac3_fixed_deinterleave_input_samples;
- s->apply_mdct = ff_ac3_fixed_apply_mdct;
- s->apply_channel_coupling = ff_ac3_fixed_apply_channel_coupling;
- s->compute_rematrixing_strategy = ff_ac3_fixed_compute_rematrixing_strategy;
+ s->allocate_sample_buffers = ff_ac3_fixed_allocate_sample_buffers;
} else if (CONFIG_AC3_ENCODER || CONFIG_EAC3_ENCODER) {
s->mdct_end = ff_ac3_float_mdct_end;
s->mdct_init = ff_ac3_float_mdct_init;
- s->apply_window = ff_ac3_float_apply_window;
- s->normalize_samples = ff_ac3_float_normalize_samples;
- s->scale_coefficients = ff_ac3_float_scale_coefficients;
- s->deinterleave_input_samples = ff_ac3_float_deinterleave_input_samples;
- s->apply_mdct = ff_ac3_float_apply_mdct;
- s->apply_channel_coupling = ff_ac3_float_apply_channel_coupling;
- s->compute_rematrixing_strategy = ff_ac3_float_compute_rematrixing_strategy;
+ s->allocate_sample_buffers = ff_ac3_float_allocate_sample_buffers;
}
if (CONFIG_EAC3_ENCODER && s->eac3)
s->output_frame_header = ff_eac3_output_frame_header;
bit_alloc_init(s);
- FF_ALLOCZ_OR_GOTO(avctx, s->mdct, sizeof(AC3MDCTContext), init_fail);
- ret = s->mdct_init(avctx, s->mdct, 9);
+ ret = s->mdct_init(s);
if (ret)
goto init_fail;
- ret = allocate_buffers(avctx);
+ ret = allocate_buffers(s);
if (ret)
goto init_fail;
- avctx->coded_frame= avcodec_alloc_frame();
-
- dsputil_init(&s->dsp, avctx);
- ff_ac3dsp_init(&s->ac3dsp, avctx->flags & CODEC_FLAG_BITEXACT);
+ ff_audiodsp_init(&s->adsp);
+ ff_me_cmp_init(&s->mecc, avctx);
+ ff_ac3dsp_init(&s->ac3dsp, avctx->flags & AV_CODEC_FLAG_BITEXACT);
- dprint_options(avctx);
+ dprint_options(s);
return 0;
init_fail:
projects / ffmpeg / blobdiff