#include <stdint.h>
-#include "libavutil/channel_layout.h"
-#include "libavutil/crc.h"
#include "libavutil/internal.h"
#include "get_bits.h"
#include "parser.h"
-#include "mlp_parser.h"
+#include "mlp_parse.h"
#include "mlp.h"
-static const uint8_t mlp_quants[16] = {
- 16, 20, 24, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
-};
-
-static const uint8_t mlp_channels[32] = {
- 1, 2, 3, 4, 3, 4, 5, 3, 4, 5, 4, 5, 6, 4, 5, 4,
- 5, 6, 5, 5, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-};
-
-const uint64_t ff_mlp_layout[32] = {
- AV_CH_LAYOUT_MONO,
- AV_CH_LAYOUT_STEREO,
- AV_CH_LAYOUT_2_1,
- AV_CH_LAYOUT_QUAD,
- AV_CH_LAYOUT_STEREO|AV_CH_LOW_FREQUENCY,
- AV_CH_LAYOUT_2_1|AV_CH_LOW_FREQUENCY,
- AV_CH_LAYOUT_QUAD|AV_CH_LOW_FREQUENCY,
- AV_CH_LAYOUT_SURROUND,
- AV_CH_LAYOUT_4POINT0,
- AV_CH_LAYOUT_5POINT0_BACK,
- AV_CH_LAYOUT_SURROUND|AV_CH_LOW_FREQUENCY,
- AV_CH_LAYOUT_4POINT0|AV_CH_LOW_FREQUENCY,
- AV_CH_LAYOUT_5POINT1_BACK,
- AV_CH_LAYOUT_4POINT0,
- AV_CH_LAYOUT_5POINT0_BACK,
- AV_CH_LAYOUT_SURROUND|AV_CH_LOW_FREQUENCY,
- AV_CH_LAYOUT_4POINT0|AV_CH_LOW_FREQUENCY,
- AV_CH_LAYOUT_5POINT1_BACK,
- AV_CH_LAYOUT_QUAD|AV_CH_LOW_FREQUENCY,
- AV_CH_LAYOUT_5POINT0_BACK,
- AV_CH_LAYOUT_5POINT1_BACK,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
-};
-
-static const uint8_t thd_chancount[13] = {
-// LR C LFE LRs LRvh LRc LRrs Cs Ts LRsd LRw Cvh LFE2
- 2, 1, 1, 2, 2, 2, 2, 1, 1, 2, 2, 1, 1
-};
-
-static const uint64_t thd_layout[13] = {
- AV_CH_FRONT_LEFT|AV_CH_FRONT_RIGHT, // LR
- AV_CH_FRONT_CENTER, // C
- AV_CH_LOW_FREQUENCY, // LFE
- AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT, // LRs
- AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT, // LRvh
- AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER, // LRc
- AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT, // LRrs
- AV_CH_BACK_CENTER, // Cs
- AV_CH_TOP_CENTER, // Ts
- AV_CH_SURROUND_DIRECT_LEFT|AV_CH_SURROUND_DIRECT_RIGHT, // LRsd
- AV_CH_WIDE_LEFT|AV_CH_WIDE_RIGHT, // LRw
- AV_CH_TOP_FRONT_CENTER, // Cvh
- AV_CH_LOW_FREQUENCY_2, // LFE2
-};
-
-static int mlp_samplerate(int in)
-{
- if (in == 0xF)
- return 0;
-
- return (in & 8 ? 44100 : 48000) << (in & 7) ;
-}
-
-static int truehd_channels(int chanmap)
-{
- int channels = 0, i;
-
- for (i = 0; i < 13; i++)
- channels += thd_chancount[i] * ((chanmap >> i) & 1);
-
- return channels;
-}
-
-uint64_t ff_truehd_layout(int chanmap)
-{
- int i;
- uint64_t layout = 0;
-
- for (i = 0; i < 13; i++)
- layout |= thd_layout[i] * ((chanmap >> i) & 1);
-
- return layout;
-}
-
-static int mlp_get_major_sync_size(const uint8_t * buf, int bufsize)
-{
- int has_extension, extensions = 0;
- int size = 28;
- if (bufsize < 28)
- return -1;
-
- if (AV_RB32(buf) == 0xf8726fba) {
- has_extension = buf[25] & 1;
- if (has_extension) {
- extensions = buf[26] >> 4;
- size += 2 + extensions * 2;
- }
- }
- return size;
-}
-
-/** 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.
- */
-
-int ff_mlp_read_major_sync(void *log, MLPHeaderInfo *mh, GetBitContext *gb)
-{
- int ratebits, channel_arrangement, header_size;
- uint16_t checksum;
-
- av_assert1(get_bits_count(gb) == 0);
-
- header_size = mlp_get_major_sync_size(gb->buffer, gb->size_in_bits >> 3);
- if (header_size < 0 || gb->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)) {
- 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 */
- return AVERROR_INVALIDDATA;
-
- mh->stream_type = get_bits(gb, 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)];
-
- ratebits = get_bits(gb, 4);
- mh->group1_samplerate = mlp_samplerate(ratebits);
- mh->group2_samplerate = mlp_samplerate(get_bits(gb, 4));
-
- skip_bits(gb, 11);
-
- mh->channel_arrangement=
- channel_arrangement = get_bits(gb, 5);
- mh->channels_mlp = mlp_channels[channel_arrangement];
- mh->channel_layout_mlp = ff_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);
- mh->group1_samplerate = mlp_samplerate(ratebits);
- mh->group2_samplerate = 0;
-
- skip_bits(gb, 4);
-
- mh->channel_modifier_thd_stream0 = get_bits(gb, 2);
- mh->channel_modifier_thd_stream1 = get_bits(gb, 2);
-
- mh->channel_arrangement=
- channel_arrangement = get_bits(gb, 5);
- mh->channels_thd_stream1 = truehd_channels(channel_arrangement);
- mh->channel_layout_thd_stream1 = ff_truehd_layout(channel_arrangement);
-
- mh->channel_modifier_thd_stream2 = get_bits(gb, 2);
-
- channel_arrangement = get_bits(gb, 13);
- mh->channels_thd_stream2 = truehd_channels(channel_arrangement);
- mh->channel_layout_thd_stream2 = ff_truehd_layout(channel_arrangement);
- } else
- return AVERROR_INVALIDDATA;
-
- mh->access_unit_size = 40 << (ratebits & 7);
- mh->access_unit_size_pow2 = 64 << (ratebits & 7);
-
- skip_bits_long(gb, 48);
-
- mh->is_vbr = get_bits1(gb);
-
- mh->peak_bitrate = (get_bits(gb, 15) * mh->group1_samplerate + 8) >> 4;
-
- mh->num_substreams = get_bits(gb, 4);
-
- skip_bits_long(gb, 4 + (header_size - 17) * 8);
-
- return 0;
-}
-
typedef struct MLPParseContext
{
ParseContext pc;
int ret;
int i, p = 0;
+ s->key_frame = 0;
+
*poutbuf_size = 0;
if (buf_size == 0)
return 0;
- if (!mp->in_sync) {
- // Not in sync - find a major sync header
-
- for (i = 0; i < buf_size; i++) {
- mp->pc.state = (mp->pc.state << 8) | buf[i];
- if ((mp->pc.state & 0xfffffffe) == 0xf8726fba &&
- // ignore if we do not have the data for the start of header
- mp->pc.index + i >= 7) {
- mp->in_sync = 1;
- mp->bytes_left = 0;
- break;
+ if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) {
+ next = buf_size;
+ } else {
+ if (!mp->in_sync) {
+ // Not in sync - find a major sync header
+
+ for (i = 0; i < buf_size; i++) {
+ mp->pc.state = (mp->pc.state << 8) | buf[i];
+ if ((mp->pc.state & 0xfffffffe) == 0xf8726fba &&
+ // ignore if we do not have the data for the start of header
+ mp->pc.index + i >= 7) {
+ mp->in_sync = 1;
+ mp->bytes_left = 0;
+ break;
+ }
}
- }
- if (!mp->in_sync) {
- if (ff_combine_frame(&mp->pc, END_NOT_FOUND, &buf, &buf_size) != -1)
+ if (!mp->in_sync) {
+ if (ff_combine_frame(&mp->pc, END_NOT_FOUND, &buf, &buf_size) != -1)
+ av_log(avctx, AV_LOG_WARNING, "ff_combine_frame failed\n");
+ return buf_size;
+ }
+
+ if ((ret = ff_combine_frame(&mp->pc, i - 7, &buf, &buf_size)) < 0) {
av_log(avctx, AV_LOG_WARNING, "ff_combine_frame failed\n");
- return buf_size;
- }
+ return ret;
+ }
- if ((ret = ff_combine_frame(&mp->pc, i - 7, &buf, &buf_size)) < 0) {
- av_log(avctx, AV_LOG_WARNING, "ff_combine_frame failed\n");
- return ret;
+ return i - 7;
}
- return i - 7;
- }
+ if (mp->bytes_left == 0) {
+ // Find length of this packet
- if (mp->bytes_left == 0) {
- // Find length of this packet
+ /* Copy overread bytes from last frame into buffer. */
+ for(; mp->pc.overread>0; mp->pc.overread--) {
+ mp->pc.buffer[mp->pc.index++]= mp->pc.buffer[mp->pc.overread_index++];
+ }
- /* Copy overread bytes from last frame into buffer. */
- for(; mp->pc.overread>0; mp->pc.overread--) {
- mp->pc.buffer[mp->pc.index++]= mp->pc.buffer[mp->pc.overread_index++];
- }
+ if (mp->pc.index + buf_size < 2) {
+ if (ff_combine_frame(&mp->pc, END_NOT_FOUND, &buf, &buf_size) != -1)
+ av_log(avctx, AV_LOG_WARNING, "ff_combine_frame failed\n");
+ return buf_size;
+ }
- if (mp->pc.index + buf_size < 2) {
- if (ff_combine_frame(&mp->pc, END_NOT_FOUND, &buf, &buf_size) != -1)
- av_log(avctx, AV_LOG_WARNING, "ff_combine_frame failed\n");
- return buf_size;
+ mp->bytes_left = ((mp->pc.index > 0 ? mp->pc.buffer[0] : buf[0]) << 8)
+ | (mp->pc.index > 1 ? mp->pc.buffer[1] : buf[1-mp->pc.index]);
+ mp->bytes_left = (mp->bytes_left & 0xfff) * 2;
+ if (mp->bytes_left <= 0) { // prevent infinite loop
+ goto lost_sync;
+ }
+ mp->bytes_left -= mp->pc.index;
}
- mp->bytes_left = ((mp->pc.index > 0 ? mp->pc.buffer[0] : buf[0]) << 8)
- | (mp->pc.index > 1 ? mp->pc.buffer[1] : buf[1-mp->pc.index]);
- mp->bytes_left = (mp->bytes_left & 0xfff) * 2;
- if (mp->bytes_left <= 0) { // prevent infinite loop
- goto lost_sync;
- }
- mp->bytes_left -= mp->pc.index;
- }
+ next = (mp->bytes_left > buf_size) ? END_NOT_FOUND : mp->bytes_left;
- next = (mp->bytes_left > buf_size) ? END_NOT_FOUND : mp->bytes_left;
+ if (ff_combine_frame(&mp->pc, next, &buf, &buf_size) < 0) {
+ mp->bytes_left -= buf_size;
+ return buf_size;
+ }
- if (ff_combine_frame(&mp->pc, next, &buf, &buf_size) < 0) {
- mp->bytes_left -= buf_size;
- return buf_size;
+ mp->bytes_left = 0;
}
- mp->bytes_left = 0;
-
- sync_present = (AV_RB32(buf + 4) & 0xfffffffe) == 0xf8726fba;
+ sync_present = buf_size >= 8 && (AV_RB32(buf + 4) & 0xfffffffe) == 0xf8726fba;
if (!sync_present) {
/* The first nibble of a frame is a parity check of the 4-byte
* access unit header and all the 2- or 4-byte substream headers. */
// Only check when this isn't a sync frame - syncs have a checksum.
+ s->key_frame = 0;
+
parity_bits = 0;
for (i = -1; i < mp->num_substreams; i++) {
parity_bits ^= buf[p++];
if (ff_mlp_read_major_sync(avctx, &mh, &gb) < 0)
goto lost_sync;
+ s->key_frame = 1;
+
avctx->bits_per_raw_sample = mh.group1_bits;
if (avctx->bits_per_raw_sample > 16)
avctx->sample_fmt = AV_SAMPLE_FMT_S32;
else
avctx->sample_fmt = AV_SAMPLE_FMT_S16;
avctx->sample_rate = mh.group1_samplerate;
+ avctx->frame_size =
s->duration = mh.access_unit_size;
if(!avctx->channels || !avctx->channel_layout) {
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