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Replace variable length array with an allocated buffer

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in the context to increase compatibility.

Originally committed as revision 21170 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Thilo Borgmann 2010-01-12 20:35:22 +00:00
parent 889fce8e30
commit ff9ea0b7cc
1 changed files with 7 additions and 2 deletions
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9
libavcodec/alsdec.c
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@ -180,6 +180,7 @@ typedef struct {
int32_t *quant_cof_buffer; ///< contains all quantized parcor coefficients
int32_t **lpc_cof; ///< coefficients of the direct form prediction filter for a channel
int32_t *lpc_cof_buffer; ///< contains all coefficients of the direct form prediction filter
int32_t *lpc_cof_reversed_buffer; ///< temporary buffer to set up a reversed versio of lpc_cof_buffer
ALSChannelData **chan_data; ///< channel data for multi-channel correlation
ALSChannelData *chan_data_buffer; ///< contains channel data for all channels
int *reverted_channels; ///< stores a flag for each reverted channel
@ -731,7 +732,7 @@ static int decode_var_block_data(ALSDecContext *ctx, ALSBlockData *bd)
int32_t *lpc_cof = bd->lpc_cof;
int32_t *raw_samples = bd->raw_samples;
int32_t *raw_samples_end = bd->raw_samples + bd->block_length;
int32_t lpc_cof_reversed[opt_order];
int32_t *lpc_cof_reversed = ctx->lpc_cof_reversed_buffer;
// reverse long-term prediction
if (*bd->use_ltp) {
@ -1359,6 +1360,7 @@ static av_cold int decode_end(AVCodecContext *avctx)
av_freep(&ctx->lpc_cof);
av_freep(&ctx->quant_cof_buffer);
av_freep(&ctx->lpc_cof_buffer);
av_freep(&ctx->lpc_cof_reversed_buffer);
av_freep(&ctx->prev_raw_samples);
av_freep(&ctx->raw_samples);
av_freep(&ctx->raw_buffer);
@ -1419,9 +1421,12 @@ static av_cold int decode_init(AVCodecContext *avctx)
num_buffers * sconf->max_order);
ctx->lpc_cof_buffer = av_malloc(sizeof(*ctx->lpc_cof_buffer) *
num_buffers * sconf->max_order);
ctx->lpc_cof_reversed_buffer = av_malloc(sizeof(*ctx->lpc_cof_buffer) *
sconf->max_order);
if (!ctx->quant_cof || !ctx->lpc_cof ||
!ctx->quant_cof_buffer || !ctx->lpc_cof_buffer) {
!ctx->quant_cof_buffer || !ctx->lpc_cof_buffer ||
!ctx->lpc_cof_reversed_buffer) {
av_log(avctx, AV_LOG_ERROR, "Allocating buffer memory failed.\n");
return AVERROR(ENOMEM);
}