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| author | Baptiste Coudurier <baptiste.coudurier@gmail.com> | 2011-06-26 14:08:22 -0700 |
|---|---|---|
| committer | Baptiste Coudurier <baptiste.coudurier@gmail.com> | 2011-06-26 14:09:48 -0700 |
| commit | 721719dd0c0321b47500fa49b649c78422e910aa (patch) | |
| tree | b4e02291fbbd422d07548d354a3762541a6b32ba /libavcodec/dnxhddec.c | |
| parent | 90a40b226a5c90e48da8041294c3782de6ee61fc (diff) | |
| download | ffmpeg-streaming-721719dd0c0321b47500fa49b649c78422e910aa.zip ffmpeg-streaming-721719dd0c0321b47500fa49b649c78422e910aa.tar.gz | |
dnxhddec: handle cid change in bitstream.
Diffstat (limited to 'libavcodec/dnxhddec.c')
| -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 8cbe1a8..43c4679 100644 --- a/libavcodec/dnxhddec.c +++ b/libavcodec/dnxhddec.c @@ -63,7 +63,7 @@ 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) { @@ -71,6 +71,11 @@ 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); @@ -82,6 +87,7 @@ 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; } @@ -89,7 +95,7 @@ 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; @@ -115,10 +121,10 @@ static int dnxhd_decode_header(DNXHDContext *ctx, const uint8_t *buf, int buf_si return -1; } - 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) { |
