mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-21 10:55:51 +02:00
libxvid: Reorder functions to avoid forward declarations; make functions static.
This commit is contained in:
Diego Biurrun
parent
7a0cb74fee
commit
219a9ed19e
@ -73,10 +73,15 @@ struct xvid_ff_pass1 {
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struct xvid_context *context; /**< Pointer to private context */
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};
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/* Prototypes - See function implementation for details */
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int xvid_strip_vol_header(AVCodecContext *avctx, AVPacket *pkt, unsigned int header_len, unsigned int frame_len);
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int xvid_ff_2pass(void *ref, int opt, void *p1, void *p2);
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void xvid_correct_framerate(AVCodecContext *avctx);
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/*
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* Xvid 2-Pass Kludge Section
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*
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* Xvid's default 2-pass doesn't allow us to create data as we need to, so
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* this section spends time replacing the first pass plugin so we can write
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* statistic information as libavcodec requests in. We have another kludge
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* that allows us to pass data to the second pass in Xvid without a custom
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* rate-control plugin.
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*/
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/* Wrapper to work around the lack of mkstemp() on mingw.
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* Also, tries to create file in /tmp first, if possible.
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@ -114,6 +119,266 @@ int ff_tempfile(const char *prefix, char **filename) {
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return fd; /* success */
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}
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/**
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* Initialize the two-pass plugin and context.
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*
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* @param param Input construction parameter structure
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* @param handle Private context handle
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* @return Returns XVID_ERR_xxxx on failure, or 0 on success.
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*/
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static int xvid_ff_2pass_create(xvid_plg_create_t * param,
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void ** handle) {
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struct xvid_ff_pass1 *x = (struct xvid_ff_pass1 *)param->param;
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char *log = x->context->twopassbuffer;
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/* Do a quick bounds check */
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if( log == NULL )
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return XVID_ERR_FAIL;
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/* We use snprintf() */
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/* This is because we can safely prevent a buffer overflow */
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log[0] = 0;
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snprintf(log, BUFFER_REMAINING(log),
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"# avconv 2-pass log file, using xvid codec\n");
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snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
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"# Do not modify. libxvidcore version: %d.%d.%d\n\n",
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XVID_VERSION_MAJOR(XVID_VERSION),
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XVID_VERSION_MINOR(XVID_VERSION),
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XVID_VERSION_PATCH(XVID_VERSION));
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*handle = x->context;
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return 0;
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}
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/**
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* Destroy the two-pass plugin context.
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*
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* @param ref Context pointer for the plugin
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* @param param Destrooy context
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* @return Returns 0, success guaranteed
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*/
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static int xvid_ff_2pass_destroy(struct xvid_context *ref,
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xvid_plg_destroy_t *param) {
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/* Currently cannot think of anything to do on destruction */
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/* Still, the framework should be here for reference/use */
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if( ref->twopassbuffer != NULL )
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ref->twopassbuffer[0] = 0;
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return 0;
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}
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/**
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* Enable fast encode mode during the first pass.
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*
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* @param ref Context pointer for the plugin
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* @param param Frame data
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* @return Returns 0, success guaranteed
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*/
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static int xvid_ff_2pass_before(struct xvid_context *ref,
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xvid_plg_data_t *param) {
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int motion_remove;
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int motion_replacements;
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int vop_remove;
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/* Nothing to do here, result is changed too much */
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if( param->zone && param->zone->mode == XVID_ZONE_QUANT )
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return 0;
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/* We can implement a 'turbo' first pass mode here */
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param->quant = 2;
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/* Init values */
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motion_remove = ~XVID_ME_CHROMA_PVOP &
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~XVID_ME_CHROMA_BVOP &
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~XVID_ME_EXTSEARCH16 &
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~XVID_ME_ADVANCEDDIAMOND16;
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motion_replacements = XVID_ME_FAST_MODEINTERPOLATE |
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XVID_ME_SKIP_DELTASEARCH |
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XVID_ME_FASTREFINE16 |
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XVID_ME_BFRAME_EARLYSTOP;
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vop_remove = ~XVID_VOP_MODEDECISION_RD &
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~XVID_VOP_FAST_MODEDECISION_RD &
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~XVID_VOP_TRELLISQUANT &
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~XVID_VOP_INTER4V &
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~XVID_VOP_HQACPRED;
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param->vol_flags &= ~XVID_VOL_GMC;
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param->vop_flags &= vop_remove;
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param->motion_flags &= motion_remove;
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param->motion_flags |= motion_replacements;
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return 0;
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}
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/**
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* Capture statistic data and write it during first pass.
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*
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* @param ref Context pointer for the plugin
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* @param param Statistic data
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* @return Returns XVID_ERR_xxxx on failure, or 0 on success
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*/
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static int xvid_ff_2pass_after(struct xvid_context *ref,
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xvid_plg_data_t *param) {
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char *log = ref->twopassbuffer;
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const char *frame_types = " ipbs";
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char frame_type;
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/* Quick bounds check */
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if( log == NULL )
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return XVID_ERR_FAIL;
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/* Convert the type given to us into a character */
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if( param->type < 5 && param->type > 0 ) {
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frame_type = frame_types[param->type];
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} else {
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return XVID_ERR_FAIL;
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}
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snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
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"%c %d %d %d %d %d %d\n",
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frame_type, param->stats.quant, param->stats.kblks, param->stats.mblks,
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param->stats.ublks, param->stats.length, param->stats.hlength);
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return 0;
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}
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/**
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* Dispatch function for our custom plugin.
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* This handles the dispatch for the Xvid plugin. It passes data
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* on to other functions for actual processing.
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*
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* @param ref Context pointer for the plugin
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* @param cmd The task given for us to complete
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* @param p1 First parameter (varies)
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* @param p2 Second parameter (varies)
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* @return Returns XVID_ERR_xxxx on failure, or 0 on success
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*/
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static int xvid_ff_2pass(void *ref, int cmd, void *p1, void *p2)
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{
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switch( cmd ) {
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case XVID_PLG_INFO:
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case XVID_PLG_FRAME:
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return 0;
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case XVID_PLG_BEFORE:
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return xvid_ff_2pass_before(ref, p1);
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case XVID_PLG_CREATE:
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return xvid_ff_2pass_create(p1, p2);
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case XVID_PLG_AFTER:
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return xvid_ff_2pass_after(ref, p1);
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case XVID_PLG_DESTROY:
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return xvid_ff_2pass_destroy(ref, p1);
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default:
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return XVID_ERR_FAIL;
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}
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}
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/**
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* Routine to create a global VO/VOL header for MP4 container.
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* What we do here is extract the header from the Xvid bitstream
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* as it is encoded. We also strip the repeated headers from the
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* bitstream when a global header is requested for MPEG-4 ISO
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* compliance.
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*
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* @param avctx AVCodecContext pointer to context
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* @param frame Pointer to encoded frame data
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* @param header_len Length of header to search
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* @param frame_len Length of encoded frame data
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* @return Returns new length of frame data
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*/
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static int xvid_strip_vol_header(AVCodecContext *avctx,
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AVPacket *pkt,
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unsigned int header_len,
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unsigned int frame_len) {
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int vo_len = 0, i;
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for( i = 0; i < header_len - 3; i++ ) {
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if( pkt->data[i] == 0x00 &&
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pkt->data[i+1] == 0x00 &&
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pkt->data[i+2] == 0x01 &&
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pkt->data[i+3] == 0xB6 ) {
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vo_len = i;
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break;
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}
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}
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if( vo_len > 0 ) {
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/* We need to store the header, so extract it */
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if( avctx->extradata == NULL ) {
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avctx->extradata = av_malloc(vo_len);
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memcpy(avctx->extradata, pkt->data, vo_len);
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avctx->extradata_size = vo_len;
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}
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/* Less dangerous now, memmove properly copies the two
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chunks of overlapping data */
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memmove(pkt->data, &pkt->data[vo_len], frame_len - vo_len);
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pkt->size = frame_len - vo_len;
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}
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return 0;
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}
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/**
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* Routine to correct a possibly erroneous framerate being fed to us.
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* Xvid currently chokes on framerates where the ticks per frame is
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* extremely large. This function works to correct problems in this area
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* by estimating a new framerate and taking the simpler fraction of
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* the two presented.
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*
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* @param avctx Context that contains the framerate to correct.
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*/
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static void xvid_correct_framerate(AVCodecContext *avctx)
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{
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int frate, fbase;
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int est_frate, est_fbase;
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int gcd;
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float est_fps, fps;
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frate = avctx->time_base.den;
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fbase = avctx->time_base.num;
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gcd = av_gcd(frate, fbase);
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if( gcd > 1 ) {
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frate /= gcd;
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fbase /= gcd;
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}
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if( frate <= 65000 && fbase <= 65000 ) {
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avctx->time_base.den = frate;
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avctx->time_base.num = fbase;
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return;
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}
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fps = (float)frate / (float)fbase;
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est_fps = roundf(fps * 1000.0) / 1000.0;
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est_frate = (int)est_fps;
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if( est_fps > (int)est_fps ) {
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est_frate = (est_frate + 1) * 1000;
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est_fbase = (int)roundf((float)est_frate / est_fps);
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} else
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est_fbase = 1;
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gcd = av_gcd(est_frate, est_fbase);
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if( gcd > 1 ) {
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est_frate /= gcd;
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est_fbase /= gcd;
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}
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if( fbase > est_fbase ) {
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avctx->time_base.den = est_frate;
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avctx->time_base.num = est_fbase;
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av_log(avctx, AV_LOG_DEBUG,
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"Xvid: framerate re-estimated: %.2f, %.3f%% correction\n",
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est_fps, (((est_fps - fps)/fps) * 100.0));
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} else {
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avctx->time_base.den = frate;
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avctx->time_base.num = fbase;
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}
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}
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/**
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* Create the private context for the encoder.
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* All buffers are allocated, settings are loaded from the user,
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@ -546,274 +811,6 @@ static av_cold int xvid_encode_close(AVCodecContext *avctx) {
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return 0;
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}
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/**
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* Routine to create a global VO/VOL header for MP4 container.
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* What we do here is extract the header from the Xvid bitstream
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* as it is encoded. We also strip the repeated headers from the
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* bitstream when a global header is requested for MPEG-4 ISO
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* compliance.
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*
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* @param avctx AVCodecContext pointer to context
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* @param frame Pointer to encoded frame data
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* @param header_len Length of header to search
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* @param frame_len Length of encoded frame data
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* @return Returns new length of frame data
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*/
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int xvid_strip_vol_header(AVCodecContext *avctx,
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AVPacket *pkt,
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unsigned int header_len,
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unsigned int frame_len) {
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int vo_len = 0, i;
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for( i = 0; i < header_len - 3; i++ ) {
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if( pkt->data[i] == 0x00 &&
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pkt->data[i+1] == 0x00 &&
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pkt->data[i+2] == 0x01 &&
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pkt->data[i+3] == 0xB6 ) {
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vo_len = i;
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break;
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}
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}
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if( vo_len > 0 ) {
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/* We need to store the header, so extract it */
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if( avctx->extradata == NULL ) {
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avctx->extradata = av_malloc(vo_len);
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memcpy(avctx->extradata, pkt->data, vo_len);
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avctx->extradata_size = vo_len;
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}
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/* Less dangerous now, memmove properly copies the two
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chunks of overlapping data */
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memmove(pkt->data, &pkt->data[vo_len], frame_len - vo_len);
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pkt->size = frame_len - vo_len;
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}
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return 0;
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}
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/**
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* Routine to correct a possibly erroneous framerate being fed to us.
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* Xvid currently chokes on framerates where the ticks per frame is
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* extremely large. This function works to correct problems in this area
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* by estimating a new framerate and taking the simpler fraction of
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* the two presented.
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*
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* @param avctx Context that contains the framerate to correct.
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*/
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void xvid_correct_framerate(AVCodecContext *avctx) {
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int frate, fbase;
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int est_frate, est_fbase;
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int gcd;
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float est_fps, fps;
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frate = avctx->time_base.den;
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fbase = avctx->time_base.num;
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gcd = av_gcd(frate, fbase);
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if( gcd > 1 ) {
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frate /= gcd;
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fbase /= gcd;
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}
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if( frate <= 65000 && fbase <= 65000 ) {
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avctx->time_base.den = frate;
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avctx->time_base.num = fbase;
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return;
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}
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fps = (float)frate / (float)fbase;
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est_fps = roundf(fps * 1000.0) / 1000.0;
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est_frate = (int)est_fps;
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if( est_fps > (int)est_fps ) {
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est_frate = (est_frate + 1) * 1000;
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est_fbase = (int)roundf((float)est_frate / est_fps);
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} else
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est_fbase = 1;
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gcd = av_gcd(est_frate, est_fbase);
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if( gcd > 1 ) {
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est_frate /= gcd;
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est_fbase /= gcd;
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}
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if( fbase > est_fbase ) {
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avctx->time_base.den = est_frate;
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avctx->time_base.num = est_fbase;
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av_log(avctx, AV_LOG_DEBUG,
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"Xvid: framerate re-estimated: %.2f, %.3f%% correction\n",
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est_fps, (((est_fps - fps)/fps) * 100.0));
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} else {
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avctx->time_base.den = frate;
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avctx->time_base.num = fbase;
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}
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}
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/*
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* Xvid 2-Pass Kludge Section
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*
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* Xvid's default 2-pass doesn't allow us to create data as we need to, so
|
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* this section spends time replacing the first pass plugin so we can write
|
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* statistic information as libavcodec requests in. We have another kludge
|
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* that allows us to pass data to the second pass in Xvid without a custom
|
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* rate-control plugin.
|
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*/
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/**
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* Initialize the two-pass plugin and context.
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*
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* @param param Input construction parameter structure
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* @param handle Private context handle
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* @return Returns XVID_ERR_xxxx on failure, or 0 on success.
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*/
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static int xvid_ff_2pass_create(xvid_plg_create_t * param,
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void ** handle) {
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struct xvid_ff_pass1 *x = (struct xvid_ff_pass1 *)param->param;
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char *log = x->context->twopassbuffer;
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/* Do a quick bounds check */
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if( log == NULL )
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return XVID_ERR_FAIL;
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/* We use snprintf() */
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/* This is because we can safely prevent a buffer overflow */
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log[0] = 0;
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snprintf(log, BUFFER_REMAINING(log),
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"# avconv 2-pass log file, using xvid codec\n");
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snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
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"# Do not modify. libxvidcore version: %d.%d.%d\n\n",
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XVID_VERSION_MAJOR(XVID_VERSION),
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XVID_VERSION_MINOR(XVID_VERSION),
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XVID_VERSION_PATCH(XVID_VERSION));
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*handle = x->context;
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return 0;
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}
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/**
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* Destroy the two-pass plugin context.
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*
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* @param ref Context pointer for the plugin
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* @param param Destrooy context
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* @return Returns 0, success guaranteed
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*/
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static int xvid_ff_2pass_destroy(struct xvid_context *ref,
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xvid_plg_destroy_t *param) {
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/* Currently cannot think of anything to do on destruction */
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/* Still, the framework should be here for reference/use */
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if( ref->twopassbuffer != NULL )
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ref->twopassbuffer[0] = 0;
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return 0;
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}
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/**
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* Enable fast encode mode during the first pass.
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*
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* @param ref Context pointer for the plugin
|
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* @param param Frame data
|
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* @return Returns 0, success guaranteed
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*/
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static int xvid_ff_2pass_before(struct xvid_context *ref,
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xvid_plg_data_t *param) {
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int motion_remove;
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int motion_replacements;
|
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int vop_remove;
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||||
|
||||
/* Nothing to do here, result is changed too much */
|
||||
if( param->zone && param->zone->mode == XVID_ZONE_QUANT )
|
||||
return 0;
|
||||
|
||||
/* We can implement a 'turbo' first pass mode here */
|
||||
param->quant = 2;
|
||||
|
||||
/* Init values */
|
||||
motion_remove = ~XVID_ME_CHROMA_PVOP &
|
||||
~XVID_ME_CHROMA_BVOP &
|
||||
~XVID_ME_EXTSEARCH16 &
|
||||
~XVID_ME_ADVANCEDDIAMOND16;
|
||||
motion_replacements = XVID_ME_FAST_MODEINTERPOLATE |
|
||||
XVID_ME_SKIP_DELTASEARCH |
|
||||
XVID_ME_FASTREFINE16 |
|
||||
XVID_ME_BFRAME_EARLYSTOP;
|
||||
vop_remove = ~XVID_VOP_MODEDECISION_RD &
|
||||
~XVID_VOP_FAST_MODEDECISION_RD &
|
||||
~XVID_VOP_TRELLISQUANT &
|
||||
~XVID_VOP_INTER4V &
|
||||
~XVID_VOP_HQACPRED;
|
||||
|
||||
param->vol_flags &= ~XVID_VOL_GMC;
|
||||
param->vop_flags &= vop_remove;
|
||||
param->motion_flags &= motion_remove;
|
||||
param->motion_flags |= motion_replacements;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* Capture statistic data and write it during first pass.
|
||||
*
|
||||
* @param ref Context pointer for the plugin
|
||||
* @param param Statistic data
|
||||
* @return Returns XVID_ERR_xxxx on failure, or 0 on success
|
||||
*/
|
||||
static int xvid_ff_2pass_after(struct xvid_context *ref,
|
||||
xvid_plg_data_t *param) {
|
||||
char *log = ref->twopassbuffer;
|
||||
const char *frame_types = " ipbs";
|
||||
char frame_type;
|
||||
|
||||
/* Quick bounds check */
|
||||
if( log == NULL )
|
||||
return XVID_ERR_FAIL;
|
||||
|
||||
/* Convert the type given to us into a character */
|
||||
if( param->type < 5 && param->type > 0 ) {
|
||||
frame_type = frame_types[param->type];
|
||||
} else {
|
||||
return XVID_ERR_FAIL;
|
||||
}
|
||||
|
||||
snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
|
||||
"%c %d %d %d %d %d %d\n",
|
||||
frame_type, param->stats.quant, param->stats.kblks, param->stats.mblks,
|
||||
param->stats.ublks, param->stats.length, param->stats.hlength);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* Dispatch function for our custom plugin.
|
||||
* This handles the dispatch for the Xvid plugin. It passes data
|
||||
* on to other functions for actual processing.
|
||||
*
|
||||
* @param ref Context pointer for the plugin
|
||||
* @param cmd The task given for us to complete
|
||||
* @param p1 First parameter (varies)
|
||||
* @param p2 Second parameter (varies)
|
||||
* @return Returns XVID_ERR_xxxx on failure, or 0 on success
|
||||
*/
|
||||
int xvid_ff_2pass(void *ref, int cmd, void *p1, void *p2) {
|
||||
switch( cmd ) {
|
||||
case XVID_PLG_INFO:
|
||||
case XVID_PLG_FRAME:
|
||||
return 0;
|
||||
|
||||
case XVID_PLG_BEFORE:
|
||||
return xvid_ff_2pass_before(ref, p1);
|
||||
|
||||
case XVID_PLG_CREATE:
|
||||
return xvid_ff_2pass_create(p1, p2);
|
||||
|
||||
case XVID_PLG_AFTER:
|
||||
return xvid_ff_2pass_after(ref, p1);
|
||||
|
||||
case XVID_PLG_DESTROY:
|
||||
return xvid_ff_2pass_destroy(ref, p1);
|
||||
|
||||
default:
|
||||
return XVID_ERR_FAIL;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Xvid codec definition for libavcodec.
|
||||
*/
|
||||
|
||||
Loading…
Reference in New Issue
Block a user