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Code Issues Releases Activity

Don't lock the channel output configuration based on the first value seen for

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non extradata formats. Instead lock it only after the successful decoding of a
frame. This fixes issue 999.

Originally committed as revision 20448 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Alex Converse 2009-11-03 22:50:02 +00:00
parent cabc41b0c2
commit 981b8fd777
2 changed files with 23 additions and 8 deletions
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19
libavcodec/aac.c
View File

@ -194,7 +194,7 @@ static int che_configure(AACContext *ac,
static int output_configure(AACContext *ac,
enum ChannelPosition che_pos[4][MAX_ELEM_ID],
enum ChannelPosition new_che_pos[4][MAX_ELEM_ID],
int channel_config)
int channel_config, enum OCStatus oc_type)
{
AVCodecContext *avctx = ac->avccontext;
int i, type, channels = 0, ret;
@ -239,7 +239,7 @@ static int output_configure(AACContext *ac,
avctx->channels = channels;
ac->output_configured = 1;
ac->output_configured = oc_type;
return 0;
}
@ -390,7 +390,7 @@ static int decode_ga_specific_config(AACContext *ac, GetBitContext *gb,
if ((ret = set_default_channel_config(ac, new_che_pos, channel_config)))
return ret;
}
if ((ret = output_configure(ac, ac->che_pos, new_che_pos, channel_config)))
if ((ret = output_configure(ac, ac->che_pos, new_che_pos, channel_config, OC_LOCKED)))
return ret;
if (extension_flag) {
@ -1676,14 +1676,16 @@ static int parse_adts_frame_header(AACContext *ac, GetBitContext *gb)
size = ff_aac_parse_header(gb, &hdr_info);
if (size > 0) {
if (!ac->output_configured && hdr_info.chan_config) {
if (ac->output_configured != OC_LOCKED && hdr_info.chan_config) {
enum ChannelPosition new_che_pos[4][MAX_ELEM_ID];
memset(new_che_pos, 0, 4 * MAX_ELEM_ID * sizeof(new_che_pos[0][0]));
ac->m4ac.chan_config = hdr_info.chan_config;
if (set_default_channel_config(ac, new_che_pos, hdr_info.chan_config))
return -7;
if (output_configure(ac, ac->che_pos, new_che_pos, hdr_info.chan_config))
if (output_configure(ac, ac->che_pos, new_che_pos, hdr_info.chan_config, OC_TRIAL_FRAME))
return -7;
} else if (ac->output_configured != OC_LOCKED) {
ac->output_configured = OC_NONE;
}
ac->m4ac.sample_rate = hdr_info.sample_rate;
ac->m4ac.sampling_index = hdr_info.sampling_index;
@ -1760,11 +1762,11 @@ static int aac_decode_frame(AVCodecContext *avccontext, void *data,
memset(new_che_pos, 0, 4 * MAX_ELEM_ID * sizeof(new_che_pos[0][0]));
if ((err = decode_pce(ac, new_che_pos, &gb)))
break;
if (ac->output_configured)
if (ac->output_configured <= OC_TRIAL_PCE)
av_log(avccontext, AV_LOG_ERROR,
"Not evaluating a further program_config_element as this construct is dubious at best.\n");
else
err = output_configure(ac, ac->che_pos, new_che_pos, 0);
err = output_configure(ac, ac->che_pos, new_che_pos, 0, OC_TRIAL_PCE);
break;
}
@ -1804,6 +1806,9 @@ static int aac_decode_frame(AVCodecContext *avccontext, void *data,
ac->dsp.float_to_int16_interleave(data, (const float **)ac->output_data, 1024, avccontext->channels);
if (ac->output_configured)
ac->output_configured = OC_LOCKED;
return buf_size;
}

12
libavcodec/aac.h
View File

@ -102,6 +102,16 @@ enum CouplingPoint {
AFTER_IMDCT = 3,
};
/**
* Output configuration status
*/
enum OCStatus {
OC_NONE, //< Output unconfigured
OC_TRIAL_PCE, //< Output configuration under trial specified by an inband PCE
OC_TRIAL_FRAME, //< Output configuration under trial specified by a frame header
OC_LOCKED, //< Output configuration locked in place
};
/**
* Predictor State
*/
@ -275,7 +285,7 @@ typedef struct {
DECLARE_ALIGNED(16, float, temp[128]);
int output_configured;
enum OCStatus output_configured;
} AACContext;
#endif /* AVCODEC_AAC_H */