/*
* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#include <string.h>
+
#include "avcodec.h"
-#include "mpegaudio.h"
-AVBitStreamFilter *first_bitstream_filter= NULL;
+#include "libavutil/internal.h"
+#include "libavutil/mem.h"
-void av_register_bitstream_filter(AVBitStreamFilter *bsf){
- bsf->next = first_bitstream_filter;
- first_bitstream_filter= bsf;
-}
+#if FF_API_OLD_BSF
+FF_DISABLE_DEPRECATION_WARNINGS
-AVBitStreamFilterContext *av_bitstream_filter_init(const char *name){
- AVBitStreamFilter *bsf= first_bitstream_filter;
+AVBitStreamFilter *av_bitstream_filter_next(const AVBitStreamFilter *f)
+{
+ const AVBitStreamFilter *filter = NULL;
+ void *opaque = NULL;
- while(bsf){
- if(!strcmp(name, bsf->name)){
- AVBitStreamFilterContext *bsfc= av_mallocz(sizeof(AVBitStreamFilterContext));
- bsfc->filter= bsf;
- bsfc->priv_data= av_mallocz(bsf->priv_data_size);
- return bsfc;
- }
- bsf= bsf->next;
- }
- return NULL;
-}
+ while (filter != f)
+ filter = av_bsf_next(&opaque);
-void av_bitstream_filter_close(AVBitStreamFilterContext *bsfc){
- av_freep(&bsfc->priv_data);
- av_parser_close(bsfc->parser);
- av_free(bsfc);
+ return av_bsf_next(&opaque);
}
-int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
- AVCodecContext *avctx, const char *args,
- uint8_t **poutbuf, int *poutbuf_size,
- const uint8_t *buf, int buf_size, int keyframe){
- *poutbuf= (uint8_t *) buf;
- *poutbuf_size= buf_size;
- return bsfc->filter->filter(bsfc, avctx, args, poutbuf, poutbuf_size, buf, buf_size, keyframe);
+void av_register_bitstream_filter(AVBitStreamFilter *bsf)
+{
}
-static int dump_extradata(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args,
- uint8_t **poutbuf, int *poutbuf_size,
- const uint8_t *buf, int buf_size, int keyframe){
- int cmd= args ? *args : 0;
- /* cast to avoid warning about discarding qualifiers */
- if(avctx->extradata){
- if( (keyframe && (avctx->flags2 & CODEC_FLAG2_LOCAL_HEADER) && cmd=='a')
- ||(keyframe && (cmd=='k' || !cmd))
- ||(cmd=='e')
- /*||(? && (s->flags & PARSER_FLAG_DUMP_EXTRADATA_AT_BEGIN)*/){
- int size= buf_size + avctx->extradata_size;
- *poutbuf_size= size;
- *poutbuf= av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
-
- memcpy(*poutbuf, avctx->extradata, avctx->extradata_size);
- memcpy((*poutbuf) + avctx->extradata_size, buf, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
- return 1;
- }
- }
- return 0;
-}
+typedef struct BSFCompatContext {
+ AVBSFContext *ctx;
+} BSFCompatContext;
-static int remove_extradata(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args,
- uint8_t **poutbuf, int *poutbuf_size,
- const uint8_t *buf, int buf_size, int keyframe){
- int cmd= args ? *args : 0;
- AVCodecParserContext *s;
+AVBitStreamFilterContext *av_bitstream_filter_init(const char *name)
+{
+ AVBitStreamFilterContext *ctx = NULL;
+ BSFCompatContext *priv = NULL;
+ const AVBitStreamFilter *bsf;
- if(!bsfc->parser){
- bsfc->parser= av_parser_init(avctx->codec_id);
- }
- s= bsfc->parser;
-
- if(s && s->parser->split){
- if( (((avctx->flags & CODEC_FLAG_GLOBAL_HEADER) || (avctx->flags2 & CODEC_FLAG2_LOCAL_HEADER)) && cmd=='a')
- ||(!keyframe && cmd=='k')
- ||(cmd=='e' || !cmd)
- ){
- int i= s->parser->split(avctx, buf, buf_size);
- buf += i;
- buf_size -= i;
- }
- }
- *poutbuf= (uint8_t *) buf;
- *poutbuf_size= buf_size;
+ bsf = av_bsf_get_by_name(name);
+ if (!bsf)
+ return NULL;
- return 0;
-}
+ ctx = av_mallocz(sizeof(*ctx));
+ if (!ctx)
+ return NULL;
-static int noise(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args,
- uint8_t **poutbuf, int *poutbuf_size,
- const uint8_t *buf, int buf_size, int keyframe){
- int amount= args ? atoi(args) : 10000;
- unsigned int *state= bsfc->priv_data;
- int i;
+ priv = av_mallocz(sizeof(*priv));
+ if (!priv)
+ goto fail;
- *poutbuf= av_malloc(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
- memcpy(*poutbuf, buf, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
- for(i=0; i<buf_size; i++){
- (*state) += (*poutbuf)[i] + 1;
- if(*state % amount == 0)
- (*poutbuf)[i] = *state;
- }
- return 1;
+ ctx->filter = bsf;
+ ctx->priv_data = priv;
+
+ return ctx;
+
+fail:
+ if (priv)
+ av_bsf_free(&priv->ctx);
+ av_freep(&priv);
+ av_freep(&ctx);
+ return NULL;
}
-static int mp3_header_compress(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args,
- uint8_t **poutbuf, int *poutbuf_size,
- const uint8_t *buf, int buf_size, int keyframe){
- uint32_t header, extraheader;
- int mode_extension, header_size;
+void av_bitstream_filter_close(AVBitStreamFilterContext *bsfc)
+{
+ BSFCompatContext *priv = bsfc->priv_data;
- if(avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL){
- av_log(avctx, AV_LOG_ERROR, "not standards compliant\n");
- return -1;
+ av_bsf_free(&priv->ctx);
+ av_freep(&bsfc->priv_data);
+ av_free(bsfc);
+}
+
+int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
+ AVCodecContext *avctx, const char *args,
+ uint8_t **poutbuf, int *poutbuf_size,
+ const uint8_t *buf, int buf_size, int keyframe)
+{
+ BSFCompatContext *priv = bsfc->priv_data;
+ AVPacket pkt = { 0 };
+ int ret;
+
+ if (!priv->ctx) {
+ ret = av_bsf_alloc(bsfc->filter, &priv->ctx);
+ if (ret < 0)
+ return ret;
+
+ ret = avcodec_parameters_from_context(priv->ctx->par_in, avctx);
+ if (ret < 0)
+ return ret;
+
+ priv->ctx->time_base_in = avctx->time_base;
+
+ ret = av_bsf_init(priv->ctx);
+ if (ret < 0)
+ return ret;
+
+ if (priv->ctx->par_out->extradata_size) {
+ av_freep(&avctx->extradata);
+ avctx->extradata_size = 0;
+ avctx->extradata = av_mallocz(priv->ctx->par_out->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
+ if (!avctx->extradata)
+ return AVERROR(ENOMEM);
+ memcpy(avctx->extradata, priv->ctx->par_out->extradata,
+ priv->ctx->par_out->extradata_size);
+ avctx->extradata_size = priv->ctx->par_out->extradata_size;
+ }
}
- header = AV_RB32(buf);
- mode_extension= (header>>4)&3;
+ pkt.data = buf;
+ pkt.size = buf_size;
+
+ ret = av_bsf_send_packet(priv->ctx, &pkt);
+ if (ret < 0)
+ return ret;
- if(ff_mpa_check_header(header) < 0 || (header&0x60000) != 0x20000){
-output_unchanged:
- *poutbuf= (uint8_t *) buf;
- *poutbuf_size= buf_size;
+ *poutbuf = NULL;
+ *poutbuf_size = 0;
- av_log(avctx, AV_LOG_INFO, "cannot compress %08X\n", header);
+ ret = av_bsf_receive_packet(priv->ctx, &pkt);
+ if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
return 0;
- }
+ else if (ret < 0)
+ return ret;
- if(avctx->extradata_size == 0){
- avctx->extradata_size=15;
- avctx->extradata= av_malloc(avctx->extradata_size);
- strcpy(avctx->extradata, "FFCMP3 0.0");
- memcpy(avctx->extradata+11, buf, 4);
- }
- if(avctx->extradata_size != 15){
- av_log(avctx, AV_LOG_ERROR, "Extradata invalid\n");
- return -1;
- }
- extraheader = AV_RB32(avctx->extradata+11);
- if((extraheader&MP3_MASK) != (header&MP3_MASK))
- goto output_unchanged;
-
- header_size= (header&0x10000) ? 4 : 6;
-
- *poutbuf_size= buf_size - header_size;
- *poutbuf= av_malloc(buf_size - header_size + FF_INPUT_BUFFER_PADDING_SIZE);
- memcpy(*poutbuf, buf + header_size, buf_size - header_size + FF_INPUT_BUFFER_PADDING_SIZE);
-
- if(avctx->channels==2){
- if((header & (3<<19)) != 3<<19){
- (*poutbuf)[1] &= 0x3F;
- (*poutbuf)[1] |= mode_extension<<6;
- FFSWAP(int, (*poutbuf)[1], (*poutbuf)[2]);
- }else{
- (*poutbuf)[1] &= 0x8F;
- (*poutbuf)[1] |= mode_extension<<4;
- }
+ *poutbuf = av_malloc(pkt.size + AV_INPUT_BUFFER_PADDING_SIZE);
+ if (!*poutbuf) {
+ av_packet_unref(&pkt);
+ return AVERROR(ENOMEM);
}
- return 1;
-}
-
-#ifdef CONFIG_DUMP_EXTRADATA_BSF
-AVBitStreamFilter dump_extradata_bsf={
- "dump_extra",
- 0,
- dump_extradata,
-};
-#endif
+ *poutbuf_size = pkt.size;
+ memcpy(*poutbuf, pkt.data, pkt.size);
-#ifdef CONFIG_REMOVE_EXTRADATA_BSF
-AVBitStreamFilter remove_extradata_bsf={
- "remove_extra",
- 0,
- remove_extradata,
-};
-#endif
+ av_packet_unref(&pkt);
-#ifdef CONFIG_NOISE_BSF
-AVBitStreamFilter noise_bsf={
- "noise",
- sizeof(int),
- noise,
-};
-#endif
+ /* drain all the remaining packets we cannot return */
+ while (ret >= 0) {
+ ret = av_bsf_receive_packet(priv->ctx, &pkt);
+ av_packet_unref(&pkt);
+ }
-#ifdef CONFIG_MP3_HEADER_COMPRESS_BSF
-AVBitStreamFilter mp3_header_compress_bsf={
- "mp3comp",
- 0,
- mp3_header_compress,
-};
+ return 1;
+}
+FF_ENABLE_DEPRECATION_WARNINGS
#endif
projects / ffmpeg / blobdiff