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| author | Baptiste Coudurier <baptiste.coudurier@gmail.com> | 2011-06-26 14:08:22 -0700 |
|---|---|---|
| committer | Alex Converse <alex.converse@gmail.com> | 2011-10-10 09:40:26 -0700 |
| commit | 11a32d53caa2c41b9f8c18a906a18b349e4e5cfd (patch) | |
| tree | 9d395929e95dd451431d8e1ae93584f327f43eb7 | |
| parent | 109d8aa1e61b17421d04ce67b806c2e909d8d49e (diff) | |
| download | ffmpeg-11a32d53caa2c41b9f8c18a906a18b349e4e5cfd.tar.gz | |
dnxhddec: handle cid change in bitstream.
| -rw-r--r-- | libavcodec/dnxhddec.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/libavcodec/dnxhddec.c b/libavcodec/dnxhddec.c index 48932783c3..956196ce64 100644 --- a/libavcodec/dnxhddec.c +++ b/libavcodec/dnxhddec.c @@ -70,7 +70,7 @@ static av_cold int dnxhd_decode_init(AVCodecContext *avctx) static int dnxhd_init_vlc(DNXHDContext *ctx, int cid) { - if (!ctx->cid_table) { + if (cid != ctx->cid) { int index; if ((index = ff_dnxhd_get_cid_table(cid)) < 0) { @@ -78,6 +78,11 @@ static int dnxhd_init_vlc(DNXHDContext *ctx, int cid) return -1; } ctx->cid_table = &ff_dnxhd_cid_table[index]; + + free_vlc(&ctx->ac_vlc); + free_vlc(&ctx->dc_vlc); + free_vlc(&ctx->run_vlc); + init_vlc(&ctx->ac_vlc, DNXHD_VLC_BITS, 257, ctx->cid_table->ac_bits, 1, 1, ctx->cid_table->ac_codes, 2, 2, 0); @@ -89,6 +94,7 @@ static int dnxhd_init_vlc(DNXHDContext *ctx, int cid) ctx->cid_table->run_codes, 2, 2, 0); ff_init_scantable(ctx->dsp.idct_permutation, &ctx->scantable, ff_zigzag_direct); + ctx->cid = cid; } return 0; } @@ -96,7 +102,7 @@ static int dnxhd_init_vlc(DNXHDContext *ctx, int cid) static int dnxhd_decode_header(DNXHDContext *ctx, const uint8_t *buf, int buf_size, int first_field) { static const uint8_t header_prefix[] = { 0x00, 0x00, 0x02, 0x80, 0x01 }; - int i; + int i, cid; if (buf_size < 0x280) return -1; @@ -135,10 +141,10 @@ static int dnxhd_decode_header(DNXHDContext *ctx, const uint8_t *buf, int buf_si } } - ctx->cid = AV_RB32(buf + 0x28); - av_dlog(ctx->avctx, "compression id %d\n", ctx->cid); + cid = AV_RB32(buf + 0x28); + av_dlog(ctx->avctx, "compression id %d\n", cid); - if (dnxhd_init_vlc(ctx, ctx->cid) < 0) + if (dnxhd_init_vlc(ctx, cid) < 0) return -1; if (buf_size < ctx->cid_table->coding_unit_size) { |