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#include <inttypes.h> |
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#include "libavutil/adler32.h" |
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#include "avformat.h" |
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#include "mux.h" |
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typedef struct CRCState { |
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uint32_t crcval; |
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} CRCState; |
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static int crc_init(struct AVFormatContext *s) |
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{ |
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CRCState *crc = s->priv_data; |
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crc->crcval = 1; |
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return 0; |
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} |
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static int crc_write_packet(struct AVFormatContext *s, AVPacket *pkt) |
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{ |
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CRCState *crc = s->priv_data; |
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crc->crcval = av_adler32_update(crc->crcval, pkt->data, pkt->size); |
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return 0; |
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} |
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static int crc_write_trailer(struct AVFormatContext *s) |
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{ |
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CRCState *crc = s->priv_data; |
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avio_printf(s->pb, "CRC=0x%08"PRIx32"\n", crc->crcval); |
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return 0; |
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} |
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const FFOutputFormat ff_crc_muxer = { |
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.p.name = "crc", |
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.p.long_name = NULL_IF_CONFIG_SMALL("CRC testing"), |
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.priv_data_size = sizeof(CRCState), |
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.p.audio_codec = AV_CODEC_ID_PCM_S16LE, |
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.p.video_codec = AV_CODEC_ID_RAWVIDEO, |
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.init = crc_init, |
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.write_packet = crc_write_packet, |
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.write_trailer = crc_write_trailer, |
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.p.flags = AVFMT_NOTIMESTAMPS, |
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}; |
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